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13531 discussions

Operations Manager / Backup Manager.
by Jeff Cleverley 31 Mar '12

31 Mar '12

Greetings, We have a 3.8 version of OM/DFM that has been managing backups from multiple sites to a NearStore. We just moved the shelves to a different NearStore yesterday due to disk count limitations. Everything went well except OM will not recognize the new destination for the relationships. A snapvault status on the secondary shows all the relationships and the aggregates and volumes are online. We did a snapvault start -S of the relationships, a snapvault update, and also a snapvault release on the primaries. The primaries all show the correct relationships. OM can see the new destination filer and all the volumes, so it has access. It has also figured out the original NearStore volumes and relationships are not there because it removed them, and also emptied the schedules of any backup relationships. We tried a "Add new backup" which seemed to have worked except it did an Initialize of the relationship according to the snapmirror log file and seems to have done a baseline. We cannot re-baseline all of these relationships. Does anyone know how to get these relationships into OM without having to do a new baseline? Thanks, Jeff -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611

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Oracle (RHEL 5.7) on NFS (Ontap 8.1RC2) - complains of write
by Fletcher Cocquyt 30 Mar '12

30 Mar '12

Hi, I'm not seeing write performance issues on the OS (throughput tests on the command line are > 100Mb/sec) But Oracle is complaining about long commit times for the Netapp NFS mount with the following options: rw,noatime,bg,hard,nointr,tcp,nfsvers=3,timeo=600,rsize=32768,wsize=32768 (matches what I see in Oracle and Netapp docs) I'm working with the DBA to see if the Oracle tuning is optimal, but thought I'd poll this list for any nuggets of tuning Oracle on Netapp NFS And the disk busy on this aggregate is only 10% - and the CPU reads 40-50% thanks! Fletcher

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Re: Oracle (RHEL 5.7) on NFS (Ontap 8.1RC2) - complains of write performance
by Fletcher Cocquyt 29 Mar '12

29 Mar '12

> Hi Dan and all - thanks for the great info! > > We'll check out dnfs and I've downloaded Netapp's SIO tool > > Will check > Flow Control (this is usually an issue if you see 10g/1g buffer overruns which could be the case since our 3270 is 10g and this client is 1g…) > test Jumbo Frames (this is challenging since it requires end to end Netapp<==switch==>client config and not all clients can/will do jumbo - bu maybe there is a hybrid where some clients are jumbo and others not?) > > Which nfsiostat tool are you referring to? > > http://sebastien.godard.pagesperso-orange.fr/man_nfsiostat.html ? Or > http://nfs-utils.sourcearchive.com/documentation/1.2.0/nfs-iostat_8py-sourc… ? > > I've also engaged Confio with their Ignite trial (which I've used to help refute server/storage vs app/oracle wait times - highly recommend it) > > > thanks again > > > > On Mar 28, 2012, at 8:03 PM, Daniel Brown wrote: > >> If this is oracle 11g, use dnfs. It will avoid mount option questions, as well as any weirdness at the kernel Nfs level. The noatime and actimeo=0 can make a big difference. Really simple to get dnfs setup. >> >> Double check mount options, looking for differences with rac vs single instance. You didn't say, and I know the docs differ for each, but aren't always very clear. go with the NetApp kb article settings. >> >> Check jumbo frames. You probably want them. >> >> Look at network Configs. We just worked on one where the issue was flow control at the network level. Getting that set right meant things worked lots better. There is a NetApp kb about it. >> >> Test with netapps sio tool. Note that oracle mostly uses direct io to bypass os level caching. Os level tools like dd or copy won't. NetApp sio offers it as an option. >> >> Install the nfsiostat tools to monitor what's going on. >> >> >> >> -- >> Dan Brown >> >> On Mar 28, 2012, at 7:42 PM, Fletcher Cocquyt <fcocquyt(a)stanford.edu> wrote: >> >>> Hi, I'm not seeing write performance issues on the OS (throughput tests on the command line are > 100Mb/sec) >>> >>> But Oracle is complaining about long commit times for the Netapp NFS mount with the following options: >>> >>> rw,noatime,bg,hard,nointr,tcp,nfsvers=3,timeo=600,rsize=32768,wsize=32768 (matches what I see in Oracle and Netapp docs) >>> >>> I'm working with the DBA to see if the Oracle tuning is optimal, but thought I'd poll this list for any nuggets of tuning Oracle on Netapp NFS >>> >>> And the disk busy on this aggregate is only 10% - and the CPU reads 40-50% >>> >>> thanks! >>> >>> Fletcher >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Toasters mailing list >>> Toasters(a)teaparty.net >>> http://www.teaparty.net/mailman/listinfo/toasters >

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Question regarding snapmirror when the source changes
by Michael Homa 22 Mar '12

22 Mar '12

Hi. Maybe someone can help with a question. I would have submitted it to netapp tech support but was unable to describe the question in 250 characters or less. I apologize for the length. We have three systems: o our production 270 (ONTAP 7.2.7) called netapp1 o a 2040, a relacement for the 270 (ONTAP 7.3.4), called netapp1-new o a 2040, used as a backup system, called netapp2 Currently, all of the production volumes (flexible, not Qtrees) on the 270 (netapp1) are being snapmirrored to both netapp1-new and netapp2 though it is not a cascade operation. Netapp1 is the source, separately, for the two 2040s. Running snapmirror destinations on netapp1 shows me the separate destinations. In the near future I will replace the 270 with the 2040 called netapp1-new. I will: o break the snapmirror relationship between the netapp1-based volumes on netapp1 and the corresponding snapmirrored volumes on netapp1-new, resulting in those netapp1-new volumes now being read/write and flexible, o shutdown netapp1, the 270, o run setup on netapp1-new, giving it the same EXACT configuration (IP, hostname, etc) as the now-shutdown 270, and o reboot the netapp1-new box, resulting it now being called netapp1 with the appropriate volumes. I've swapped out the 270 and swapped in the 2040. But, the 2040 looks for all intents and purposes like it was the 270. Same hostname, same IPs. Exports, hosts.equiv, and netgroup will all be taken care of. Here comes the issue. As I said, the netapp1 volumes, on the 270, were also being snapmirrored to netapp2, the second of the 2040s. Now that netapp1, the snapmirror source, is a 2040, can I continue to run snapmirror update from netapp2 on the netapp1-based volumes or is there no relationship anymore, forcing me to run snapmirror initialization from netapp2 on all the netapp1 volumes? Worse case situation (not a deal breaker) - it will take one or two days to re-initialize versus the two hours the updates take. Anyways, if someone could shed some light or point me to some info that would be great. I didn't find anything in the Snapmirror Overview and Best Practices Guide. Michael Homa Enterprise Systems and Development Group Academic Computing and Communication Center University of Illinois at Chicago email: mhoma(a)uic.edu

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Snapmirror Sync
by Milazzo Giacomo 22 Mar '12

22 Mar '12

Hi all, what is your opinion and your experience, if any, on using Snapmirror Sync. I mean what's about media, bandwidth limits, special configuration, overhead on CPU and so on. Can this replication method used for environments where both RPO and RTO should be around zero? Regards, Dott. Giacomo Milazzo [Descrizione: cid:image001.jpg@01C75422.0D316270] Technical Account Manager Sinergy SpA Filiale di Roma * 00198. viale Regina Margherita, 269 ' (+39) 3406001045 0644245272 7 (+39) 0226922048 * Giacomo.Milazzo(a)Sinergy.it

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least busy aggr report?
by Fletcher Cocquyt 22 Mar '12

22 Mar '12

While looking to locate the next Oracle VM I am wishing there was a least busy aggr report. I've been doing spot tests to decide, but it would be great if in addition to the "days to full" report there was an analogous IOPS capacity report. thanks, Fletcher http://vmadmin.info

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re[4]: Physical reallocate for a deduped volume
by Mathew Kilham 21 Mar '12

21 Mar '12

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Query Netapp for NFS client mount options?
by Fletcher Cocquyt 21 Mar '12

21 Mar '12

I'd like to know which NFS clients are mounted with the noac option. Can I query OnTap 8.1RC2 for this info? If so, how? thanks, Fletcher.

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Physical reallocate for a deduped volume
by Mathew Kilham 20 Mar '12

20 Mar '12

Hi Toasters, I've posed the following question to NetApp support but wasn't too confident in the answer I received, so I was hoping the knowledgeable folks on this list could assist? Also, before I begin, please excuse any ignorance or NetApp faux pas on my behalf, I'm far from an expert at administering NetApp filers. --- We have a FAS2050C running DOT 7.3.4. We recently added an external disk shelf to the filer and performed a bit of reorganisation, which has left us with two unused disks in the internal shelf. We want to add these two disks to an existing 16-disk aggregate by expanding it's RAID group size from 16 to 18. The aggregate is currently ~80% full and contains 5 flexvols, most of which have de-dupe and snapshots enabled. I understand that after expanding the RG / aggregate we need to run a physical reallocate or else we will end up with a significant "hot spot" on the newly-added disks. I also understand that we need ensure DOT only does a physical redistribution of the blocks across all disks in the aggregate and does not try to otherwise rearrange them, otherwise we risk "un-deduping" our deduplicated data and/or greatly increasing the space consumed by our snapshots. First question: I believe the command we need to run to perform the above style of reallocation is "reallocate start -f -p /vol/<volname>" - is that correct? I noted, however, that there is a warning with regards to the "reallocate -p" command in the release notes of 7.3.x. Unfortunately I can't find a link anymore, but it reads: "A file reallocation scan using reallocate start or reallocate start -p does not rearrange blocks that are shared between files by deduplication on deduplicated volumes. Since a file reallocation scan does not predictably improve read performance when used on deduplicated volumes, performing file reallocation on deduplicated volumes is not recommended. Instead, for files to benefit from the reallocation scan, they should be stored on volumes that are not enabled for deduplication." I then queried with NetApp how we could perform a physical reallocate on the aggregate to avoid a hot spot, given the above statement that "reallocate start -p does not rearrange blocks that are shared between files by deduplication on deduplicated volumes", and almost all of our data is deduped. After a bit of to-ing and fro-ing with NetApp, the final suggestion was as follows: "Ive talked to two senior resources so far about this. The suggested steps are as follows>> #1: add your disks to the aggregate, and then grow the volume. #2: Turn off Deduplication, ( no, this will not revert to the 2.5 gigs from the one gig ratio it is now and suddenly cause you to be out of space) this will only stop deduplication from this point forward until it is re-enabled later. Everything that is currently deduped will stay the ratio it is. #3: Perform the reallocate p command as specified in the KBs sent earlier. #4: After all above steps are performed and reallocate is done, re-enable deduplication on said volumes." Second question: Does this sound kosher - will this actually result in a physical reallocate being performed, or will the deduped blocks still be skipped because they're already de-duplicated, regardless of whether dedupe is enabled for new data on the volume or not? Third question: If yes to the previous question, is there any risk that our deduped data get un-deduped by performing the suggested steps above? Fourth and final question: Is there any way to measure how data is spread across disks in a Raid Group / aggregate, so that I can check that we get our expected results from the reallocate? Thanks everyone, really appreciate any feedback / assistance. Cheers, Matt

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Strange error when running autosupport.doit
by Dan Finn 16 Mar '12

16 Mar '12

I noticed that when I run an autosupport.doit I get the following error: Thu Mar 15 15:39:16 MDT [na04: asup.general.file.create.failed:error]: AutoSupport file (/mroot/etc/log/.cm_stats_hourly_done) was unable to be written to the file spool subdirectory. But the autosupport email still makes it out and looks good. I deleted everything under /etc/log/autosupport and I also tested that I could create the file that is mentioned in the error manually as root, no issues there. Anyone else ever seen this before?

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vfiler root IO and performance across aggregates?
by Randy Rue 15 Mar '12

15 Mar '12

Hello All, We're about to spin up a new 3240 active/passive HA pair with a few hundred SATA disks divided into five aggregates for best RAID distribution and overall IOps. We'll be serving up NFS data from a dozen or two volumes, divided across the aggregates for roughly even capacity and IO load. For clarity of management and to ease any possible portability issues later I like the idea of running all of this under a vfiler. Got a few questions first, however. Do I create any CPU/RAM bottleneck by putting all of this under one vfiler? For example, would I be forcing otherwise multi-threaded processes onto one CPU? (Oh, we're running 8.0.2P5 in 7-mode, BTW) I have to put the root volume for that vfiler on one of those aggregates. Will heavy processing traffic cause heavier disk IO to the aggregate housing the root? Or is the vfiler root held in RAM? Seems like it could be and would be a good idea to do it that way. In either case, seems like it would make sense to put the vfiler root on aggr0, which uses up three disks to create 1.25TB and otherwise only contains the physical filer's root. Any other considerations I should know about? Hope to hear from you, Randy

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migrate a vfiler between different HA clusters?
by Randy Rue 13 Mar '12

13 Mar '12

Hello All, We have a vfiler "x" currently sitting on one node of a v3170 HA pair. We want to move it to a new 3240 HA pair. Looks like the automagic tools that NetApp offers for this can't work for us because a) the destination filer has less NVRAM than the source, and b) the source is at 7.3.5 and the destination 8.0.2. We could create a new vfiler on the destination and snapmirror every volume. But we don't use qtrees. There are default qtrees on the dozen or two volumes on the source vfiler, but these can't be snapmirrored to the destinations as (if I understand this correctly) directly as the snapmirror process first deletes the destination qtree and then recreates it. And if you delete the default qtree (qtree0) for a volume you delete the volume. In other words, this path would require we create a qtree below the default and end up with an added folder in the path of the copied destination folder, and need to touch every client that connects to the export. The new HA pair is in a different subnet than the source. So the IP address of the vfiler will change. But ideally nothing else should. Anybody got any ideas for how to do this short of creating a new vfiler from scratch and using rsync to move all the data via NFS? RE-assigning DNS names and AD memberships during a switchover outage?

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DNS server failover timeout.
by Jeff Cleverley 12 Mar '12

12 Mar '12

Greetings, I can't find anything useful regarding DNS server entries in resolv.conf. The main filers in question are 7.3.5.1P4. We had the first DNS server in resolv.conf go down unexpectedly. The filers did not timeout the first server and go to the secondary in a timely manner. I was able to edit the resolv.conf files and rotate the order to get things happy again. This leads me to 2 questions: 1. Is there an option to set the DNS lookup timeout so that it goes to the next server in the list? 2. Does anyone know the default timeout before the filer goes to the next server in the list? Thanks, Jeff -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611

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Aggregate Committed Capacity in OpsMgr/DFM/Oncommand Console
by Fred Grieco 12 Mar '12

12 Mar '12

How is the "Aggregate Committed Space" calculated in DFM/OpsMgr, and can it be adjusted? The Aggregate Committed Space that I see in DFM is always seemingly too high, and this has been true in many version. When I add up the volume committed space in the volumes contained, add the aggregate reserve space, and divide by the total aggregate space, the percent is always lower than what DFM says by about 5%. Where do they get their number? Am I missing something? TIA, Fred

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c-mode how to set NDMP blocking factor
by Mike Thompson 09 Mar '12

09 Mar '12

Hey all, I'm trying to increase performance of fiber channel NDMP backups we have going to a remote tape robot (bridged over WAN via some Cienna gear). I would like to try increasing the blocking factor that the filer uses when writing to tape over NDMP. I'm running Ontap 8.0.1 c-mode, with NetBackup 6.5. None of the docs explain how to do this, but there is mention of blocking factor in the Data Protection manual. All it says is that block size up to 256KB is supported, and that the variable MOVER_RECORD_SIZE is what controls that. It appears that you can send variable settings to NDMP by using 'set variable=value' at the top of your includes list in the backup policy in NetBackup. I have tried putting 'set MOVER_RECORD_SIZE=256' at the top of my includes list, and running the job, but I get this in the /mroot/etc/mlog/ndmpd.log: INFO: Pass through of unknown START BACKUP variable MOVER_RECORD_SIZE with value 256 I have also tried setting the variable DATA_BLOCK_SIZE, but get the same result. So the question is, how do I set the blocking factor for NDMP backups?

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HbaPortToIomSquares_Alert
by Jon Bousselot 09 Mar '12

09 Mar '12

I've seen this message on two different filers now, a 2040 and a 3140 with multiple DS4243 shelves. It only shows up during a reboot, and I'm not finding anything on the NOW site. Both systems are running 8.1RC2. Any one else seeing this? -Jon Subject: HA Group Notification from filer01 (SAS Connectivity Monitor: HbaPortToIomSquares_Alert[2c]) WARNING

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user quota management.....by users
by Kennedy, Jeffrey 07 Mar '12

07 Mar '12

Has anyone come across, or developed, a utility to allow non-privileged users to manage user quotas on 7G? The situation is a need to allow certain leads the ability to manage user quotas for specific file systems only. Not so much the default user quota but unique quotas. Thanks. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592

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DFM migration.
by Jeff Cleverley 06 Mar '12

06 Mar '12

Greetings, I need to change the hardware and OS for my current 3.7 DFM server. I've set up another box with the new OS and installed the 4.0.2 release. I have successfully imported (AFAIK) a copy of the old database. I am not the primary user of DFM and would like to have the primary user be able to do some testing and looking around before trying to make a more permanent switch. My concern is having 2 instances of DFM trying to run backups, purge snapshots, etc. The new host name is not listed in hosts.equiv and it doesn't have ssh keys on filers. There are no entries for the ndmp credentials. Will having 2 of these online cause a problem? If so, what is the best way to have the second one online in more of a read-only/browse type mode? For those who will ask, I'm not going straight to OnCommand yet because I don't know enough about it yet. There are also several packages that seem to only run on Windows, and some that mention only running on 32 bit OS and hardware. We are primarily a linux lab and I don't want to have to set up a Windows server or have to go to Goodwill and try to find a 32 bit server :-) Jeff -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611

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Experience with Backup Software using NDMP
by Steffen Knauf 04 Mar '12

04 Mar '12

Hi Toasters, we consider to buy a new Backup Software and i don't know whats the best Software. Now, we are using Netvault (vian ndmp)but it don't works very well (e.g. problems with deduplication.....). We backup ~ 10 TB via NDMP to a LTO 5 Tapelibrary. Perhaps someone have experience with other Backup Software. Netvault sucks generally ;( greets Steffen

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max directory depth and max dir size
by Nicholas Bernstein 02 Mar '12

02 Mar '12

Maybe I'm just being an idiot, but I couldn't seem to find best practices that describe max directory depth and size. I know anecdotally directories shouldn't be larger than 10mb (the directory itself, not the contents) but I can't seem to find an official best practice guide that has these. Can anyone point me to the right doc? Thanks in advance, Nick

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backing up a small toaster
by Tom Yates 02 Mar '12

02 Mar '12

Is there anyone out there backing up a toaster *not* using a commercial NDMP-compliant product (eg, Netbackup)? How do you do it? Do I have any options besides (a) direct-attach a dedicated tape drive or (b) commercial NDMP-enabled software, which will enable me to get both UNIX-specific information and CIFS-specific information onto tape safely? Thanks for any light anyone can shed. -- Tom Yates - http://www.teaparty.net

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snapshot bolus after re-enabling de-dup
by Fletcher Cocquyt 01 Mar '12

01 Mar '12

We re-enabled dedup on one of our volumes yesterday and observed the 'df-sh' savings go from 20% to 37% (yay!) but the volume usage jumped up snap list revealed a big delta from our usual nightly snapshot delta: > snap list vm65net Volume vm65net working... %/used %/total date name ---------- ---------- ------------ -------- 0% ( 0%) 0% ( 0%) Mar 01 13:47 irt-na03(1573989836)_vm65net.450 (snapmirror) 37% (37%) 27% (27%) Mar 01 00:00 nightly.0 39% ( 4%) 29% ( 2%) Feb 29 00:00 nightly.1 41% ( 5%) 32% ( 2%) Feb 28 00:00 nightly.2 42% ( 4%) 33% ( 2%) Feb 27 00:01 nightly.3 43% ( 4%) 35% ( 2%) Feb 26 00:00 nightly.4 44% ( 4%) 37% ( 2%) Feb 25 00:00 nightly.5 45% ( 4%) 39% ( 2%) Feb 24 00:00 nightly.6 Is this expected behavior? (when I noted these observations I was asked "doesn't dedup work on the snapshots too?") thanks Fletcher

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Snapdrive failing to create a flexclone but only on Sundays. Works fine every other day of the week.
by Dan Finn 27 Feb '12

27 Feb '12

Long story short we have a clone of our production database that we refresh and remount on a linux server every night. This is a script that is being called from cron. We recently converted the server that runs this script from a physical server to a vmware vm. Since we have done that this refresh process has failed the past 3 sunday nights. It runs every single night and it runs without errors every other night. There's not much to the script, here's the command that creates the flex clone: snapdrive snap connect -lun log/disk disk_$LUN -snapname filer:/vol/database_volume/log/disk:$SNAPNAME them we mount the flex clone that is create via iSCSI. The error that is being reported by the script is: 385 connecting filer:/vol/database_volume/log/disk: 386 creating unrestricted volume clone filer:/vol/clone_volume ... failure 387 0002-098 Admin error: Failed to create volume clone clone_volume on filer filer : The volume is not currently available The error from the sd-trace.log: 173338 00:30:54 02/26/12 [f7f61b90]i,2,18,FilerZephyr::volume_clone_create: zapi filer root "" volume-clone-create parent-snapsho t daily-2012-02-26 parent-volume database_volume space-reserve none volume planningdb_rootdb_log 173339 00:30:54 02/26/12 [f7f61b90]i,2,18,FilerZephyr::volume_clone_create in = <volume-clone-create> 173340 <parent-volume>database_volume</parent-volume> 173341 <parent-snapshot>daily-2012-02-26</parent-snapshot> 173342 <volume>clone_volume</volume> 173343 <space-reserve>none</space-reserve> 173344 </volume-clone-create> 173345 173346 00:30:54 02/26/12 [f7f61b90]i,2,18,FilerZephyr::output in = <results reason="The volume is not currently available" statu s="failed" errno="13156"/> 173347 173348 00:30:54 02/26/12 [f7f61b90]E,2,18,FilerZephyr:: (filer) volume-clone-create failed, error: 13156: The volume is not currently available And then what's odd is if you look at the messages file on the filer, it's reporting as if the clone was successfully created: Sun Feb 26 00:29:28 MST [filer: wafl.snap.delete:info]: Snapshot copy 2012-02-24 07_00_27 daily_filer_database_volume.-.log on volume database_volume NetApp was deleted by the Data ONTAP function zapi_snapshot_delete. The unique ID for this Snapshot copy is (111, 4139408). Sun Feb 26 00:30:56 MST [filer: wafl.volume.clone.created:info]: Volume clone clone_volume of volume database_volume was created successfully. Sun Feb 26 00:30:56 MST [filer: lun.newLocation.offline:warning]: LUN /vol/clone_volume/log/disk has been taken offline to prevent map conflicts after a copy or move operation. Sun Feb 26 00:30:56 MST [filer: lun.map:info]: LUN /vol/clone_volume/disk was mapped to initiator group linux-server.domain.com_iscsi_SdIg=0 The only thing I'm wondering is if that zapi_snapshot_delete that is happening 1 second before could be causing an issue however I looked at the logs from the past sunday failure and that zapi_snapshot_delete did not happen at the same time so I'm not sure that's the issue. Any help would be really appreciated. Thanks, Dan

1 0

bypassed disks - whats the deal?
by Fletcher Cocquyt 26 Feb '12

26 Feb '12

We've discovered a couple of these bypassed disk conditions via the flashing amber light - but this was noticed totally out of band with normal support Each time we opened a case manually and Netapp immediately sent out a disk replacement. So why is a bypassed disk not treated as a failed disk ? This kind of silent failure (in terms of Netapp monitoring and alerts) in a lights out datacenter seems negligent. Message logged on syslog server: esh.bypass.err.disk:error]: Disk 4d.49 on channels 4d/PARTNER disk shelf ID 3 ESH A bay 1 Bypassed due to the drive self bypass. BTW: I read the KB article on bypassed disks and ran the CMD to highlight BYP but it did not show BYP https://kb.netapp.com/support/index?page=content&id=3012395 thanks, Fletcher

6 6

migrating vol0 (root) to new aggr
by Fletcher Cocquyt 23 Feb '12

23 Feb '12

Hola guru's I've done the steps to migrate vol0 from aggr0 to aggr1 from: https://communities.netapp.com/thread/11439 vol restrict newroot vol copy start -S root newroot vol online newroot vol options newroot root # aggr options root is from maintenance mode...when done here the aggregate containing newroot will become root since it has the root volume. vol status # confirm newroot is "diskroot" reboot vol status # confirm newroot is now root vol offline root vol destroy root vol rename newroot root -- and am about to reboot Is it necessary to do the aggr options aggr1 root Or only if on reboot ontap can't find the root vol0 on aggr1? thanks Fletcher

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