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RE: NetApp soon to be user
by Sam Schorr 20 Nov '98

20 Nov '98

Rick, We have run into a couple of significant issues with CIFS that may, or may not, be relevant. NT uses a thing called oplocks (opportunistic locking) as a "performance enhancement". The filer supports this method of locking. In our environment, we do not have individual user shares - we have a number of NT servers running Microsoft's IIS. Thus our Internet servers (IIS) receive both PUT (file write) and GET (file read) requests through the internet that come in as anonymous users. IIS has several NT user accounts that it uses to make the corresponding access calls. In our case, those calls are to create directories and files which we put on a 740. Well, it turns out that there is some "feature" in NT that causes IIS to hang if oplocks are on. Essentially, somewhere in the SMB traffic that is hitting a shared file from multiple "users", if the number of simultaneous requests is large, NT timeouts which hangs the user - in our case, an entire IIS server. Doing a CIFS TERMINATE on that server can free it, but this is a horrible practice. The workaround is to turnoff oplocks and control file access through application logic. The second issue is a hardcoded limit in the filer that does not allow for more then slightly more then 65K of directories in one directory tree. Most folks wouldn't run into this, but we create an NT folder for every user who uses our site to build their own web pages. This limit is not documented (there is a limit of approx. 300,000 file sin one directory and a maxfiles limit that is dependent on number/capacity of disk drives that are documented). The last issue is multi-homing on an NT domain environment. If you want more info on that, let me know - it doesn't sound like you would run into this. Sam Schorr Homestead Technologies ph: (650) 549-3152 fax: (650) 364-7329 sschorr(a)homestead.com Don't just build a home page...build a Homestead!! http://www.homestead.com -----Original Message----- From: Berkenbush, Richard E. [mailto:BERKENBUSH@pcmail.systems.gec.com] Sent: Friday, November 20, 1998 7:05 AM To: 'toasters(a)mathworks.com' Subject: NetApp soon to be user Hello all, I am in the process of purchasing a 720 to be used for TDM storage for SDRC in a mixed UNIX and NT environment. We also would like to consider its use for PDM storage using Sherpa and Oracle. Our intentions are to pilot the 720 with SDRC and phase in the PDM data base for pilot purposes only. Should this be successful, we would then purchase a higher end model such as the 740 or 760. Also we have a need to consider an enterprise wide data storage solution which would involve UNIX and NT data up to 3500 G. Has anyone out there had any bad experience with the Network Appliance products that I should be aware of? End Thank you, Rick Berkenbush Marconi Aerospace Systems Inc.

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NetApp soon to be user
by Berkenbush, Richard E. 20 Nov '98

20 Nov '98

Hello all, I am in the process of purchasing a 720 to be used for TDM storage for SDRC in a mixed UNIX and NT environment. We also would like to consider its use for PDM storage using Sherpa and Oracle. Our intentions are to pilot the 720 with SDRC and phase in the PDM data base for pilot purposes only. Should this be successful, we would then purchase a higher end model such as the 740 or 760. Also we have a need to consider an enterprise wide data storage solution which would involve UNIX and NT data up to 3500 G. Has anyone out there had any bad experience with the Network Appliance products that I should be aware of? End Thank you, Rick Berkenbush Marconi Aerospace Systems Inc.

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subscribe toasters
by Ståle Aartun 20 Nov '98

20 Nov '98

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None
by Frans van Aken 19 Nov '98

19 Nov '98

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snapshot and df does not match?
by Madhu Chandra 17 Nov '98

17 Nov '98

Hi All, Eventhough my snap list shows less than 100%, Why my df command shows 130%? Is there any hidden files that I need to delete? How does this sanp list matches with df's capacity? Following is the snap list and df commands for my F520 version 5.1 snap list Volume vol0 working................. %/used %/total date name ---------- ---------- ------------ -------- 4% ( 4%) 3% ( 3%) Nov 17 00:00 nightly.0 4% ( 4%) 3% ( 3%) Nov 16 16:00 hourly.0 5% ( 4%) 3% ( 3%) Nov 16 08:00 hourly.1 5% ( 4%) 4% ( 3%) Nov 16 00:00 weekly.0 5% ( 4%) 4% ( 3%) Nov 15 00:00 nightly.1 9% ( 4%) 6% ( 3%) Nov 14 00:00 nightly.2 12% ( 5%) 9% ( 3%) Nov 13 00:00 nightly.3 28% (21%) 26% (17%) Nov 09 00:00 weekly.1 df Filesystem kbytes used avail capacity Mounted on /vol/vol0/ 50603952 45514752 5089200 90% /vol/vol0/ /vol/vol0/.snapshot 12650988 16497100 0 130% /vol/vol0/.snapshot Thanks for the help Madhu

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subscribe fva@oce.nl
by Frans van Aken 16 Nov '98

16 Nov '98

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Re: DLT 4500's?
by Jim Ripley (49er Fan) 13 Nov '98

13 Nov '98

The DLT4500 is supported in multiple D patch releases. The latest D patch release for the 4.3.4 tree is 4.3.4D9 and can be obtained at: http://now.netapp.com/download/software/ontap/4.3.4D9/ Hope this helps. Jim -->>Date: Thu, 12 Nov 1998 22:39:04 -0800 (PST) -->>From: Brian Rice <brice(a)gnac.com> -->>To: toasters(a)mathworks.com -->>Subject: DLT 4500's? -->> -->>Looks like DLT 4500's are not supported, or at least not by 4.3.4 on F630's. -->>sysconfig -t says "non-qualified tape drive," and one gets no tape devices. -->> -->>Anyone had any experience to the contrary? I plan to call 888-4-NETAPP -->>and make nice in the morning, but I wanted to find out if anyone has had -->>other experiences, say with later revs of the OS. -->> -->>I'd rather not run permanently with a non-supported library, even if -->>NAC has a back-door patch for it. I think I need to bite the bullet -->>and buy a real tape drive. But this 4500 (which we found in the tomb -->>of Ramses II, believe it or not) would be a nice stopgap if that were -->>possible. -->> -->>Thanks, y'all. -->> -->>Brian Rice -->>brice(a)gnac.com

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Re: DLT 4500's?
by Jason D. Kelleher 13 Nov '98

13 Nov '98

In message <199811130639.WAA15113(a)tweety.main.gnac.com>, Brian Rice writes: >Looks like DLT 4500's are not supported, or at least not by 4.3.4 on F630's >. >sysconfig -t says "non-qualified tape drive," and one gets no tape devices. > >Anyone had any experience to the contrary? I plan to call 888-4-NETAPP >and make nice in the morning, but I wanted to find out if anyone has had >other experiences, say with later revs of the OS. > >I'd rather not run permanently with a non-supported library, even if >NAC has a back-door patch for it. I think I need to bite the bullet >and buy a real tape drive. But this 4500 (which we found in the tomb >of Ramses II, believe it or not) would be a nice stopgap if that were >possible. The problem with the 4500's is that ONTAP looks at the SCSI ID string and barfs if it's not a value it expects. You have two options, get NetApp to give you a "D" release which supports 4500s or change the SCSI ID which your drive returns. I've tried both. Getting the "D" releases is annoying, they come out at a several week lag to the production release. I managed to get an app from our drive vendor, BoxHill, which allows me to change how the drive reports itself. Now my filer happily writes 40GB to an "Exabyte 8500". good luck, jason

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DLT 4500's?
by Brian Rice 13 Nov '98

13 Nov '98

Looks like DLT 4500's are not supported, or at least not by 4.3.4 on F630's. sysconfig -t says "non-qualified tape drive," and one gets no tape devices. Anyone had any experience to the contrary? I plan to call 888-4-NETAPP and make nice in the morning, but I wanted to find out if anyone has had other experiences, say with later revs of the OS. I'd rather not run permanently with a non-supported library, even if NAC has a back-door patch for it. I think I need to bite the bullet and buy a real tape drive. But this 4500 (which we found in the tomb of Ramses II, believe it or not) would be a nice stopgap if that were possible. Thanks, y'all. Brian Rice brice(a)gnac.com

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Re: copying a snapshot file back over a recently-edited file
by sirbruce＠ix.netcom.com 13 Nov '98

13 Nov '98

Yes, it's perfectly normal, and I think it's even documented in the manual. cp and other programs make the assumption that if it's the same inode, the files are identical, and due to the way snapshots work, it's the same inode. Copying it from what looks like another filesystem to the client is the easiest way to get around it. If you don't want people accessing the snapshot directories that way, just mv or remove the old file first. Bruce

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