Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
Can someone help?
Thank you. July ---------------------------------------------------------------- July A. J. Linett, VP Tech Mktg 302.266.9408 july@zerowait.com
Zerowait: Best Of Breed Internet Core Technologies Web Acceleration ** Data Storage ** Load Balancing www.zerowait.com*www.loadbalancing.net*www.nas-san.com -------------------------------------------------------------------
The syntax is: filer> vol create volname_here -r raid_size number_of_disks@disk_size
The following command creates a volume name vol2, with a raid size of 10 containing 10 disks using 36GB drives. That would be 9 data and 1 parity disk. filer> vol create vol2 -r 10 10@36
July at Zerowait wrote:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
Can someone help?
Thank you. July
July A. J. Linett, VP Tech Mktg 302.266.9408 july@zerowait.com
Zerowait: Best Of Breed Internet Core Technologies Web Acceleration ** Data Storage ** Load Balancing www.zerowait.com*www.loadbalancing.net*www.nas-san.com
-- --------------------------------------------------------------- G D Geen mailto:geen@ti.com Texas Instruments Phone : (972)480.7896 System Administrator FAX : (972)480.7676 --------------------------------------------------------------- Life is what happens while you're busy making other plans. -J. Lennon
First, your default raid group size is set via `vol options vol0 raidsize N' where N is the size of your raid group. Then when you add disks to your volume the raid groups are built up to the raidsize. Once the raid group has reached raidsize, a new raid group will be created.
As far as mixing SCSI and FC-AL, I don't know...
Tom
On Tue, 28 Mar 2000, July at Zerowait wrote:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
Can someone help?
Thank you. July
July A. J. Linett, VP Tech Mktg 302.266.9408 july@zerowait.com
Zerowait: Best Of Breed Internet Core Technologies Web Acceleration ** Data Storage ** Load Balancing www.zerowait.com*www.loadbalancing.net*www.nas-san.com
On Tue, Mar 28, 2000 at 03:52:57PM -0500, July at Zerowait wrote:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
every volume is at least one raid group. raid groups won't contain multiple volumes, but volumes can contain multiple raid groups. when you create a new volume you create at least one new raid group. default raid group size is 14 disks, but you can force more ( up to 28 ) , do a vol create to get usage.
-s
What a unique name, July! I hope the following helps your filer situation.
From July at Zerowait on Tue, 28 Mar 2000 15:52:57 EST:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Inherited boxes, gotta love 'em! =)
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
The reason you didn't find any language describing the procedure for creating a new raid group is because you don't have to. =)
When a volume is created, an initial raid group is created, usually with two disks - one for parity and one for data. Once you have added n+2 (where n is the "raidsize") to the volume, it will automatically create a new raid group to house the 2 disks beyond raidsize. Note that you cannot add n+1 disks to a volume because a raid group must have at least two disks.
For example, you create the volume "myvol" with two disks using the command "vol create myvol 2". The default "raidsize" for volumes is 14 disks. If you issue the command "vol add myvol 12", all disks will be added to the first raid group. If you then try "vol add myvol 2" it will automatically create a new raid group with 2 disks. It's that easy!
Things to be aware of:
1) You can not decrease the size of a raid group once it has been filled. Changing the option "raidsize" with the command "vol options <volname> raidsize <# of disks>" only changes the maximum number of disks to be added to the current non-full and future raid groups on the volume.
2) You can not decrease the size of a volume, a corrolary to the above point. Don't commit disks to a volume unless you're sure you don't need them for another volume, or for hot spares.
3) Every raid group requires one parity drive and the max "raidsize" is 28. So if you want more data protection, set "raidsize" lower. If you want to maximize the number of disks used for data over parity and are willing to risk losing the whole filesystem in the event of a double-disk failure, set "raidsize" higher.
Does that answer all your questions?
-- Jeff
-- ---------------------------------------------------------------------------- Jeff Krueger E-Mail: jeff@qualcomm.com NetApp File Server Lead Phone: 858-651-6709 IT Engineering and Support Fax: 858-651-6627 QUALCOMM, Incorporated Web: www.qualcomm.com
Thanks to everyone for the input. This group is great!
July
Jeff Krueger wrote:
What a unique name, July! I hope the following helps your filer situation.
From July at Zerowait on Tue, 28 Mar 2000 15:52:57 EST:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Inherited boxes, gotta love 'em! =)
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
The reason you didn't find any language describing the procedure for creating a new raid group is because you don't have to. =)
When a volume is created, an initial raid group is created, usually with two disks - one for parity and one for data. Once you have added n+2 (where n is the "raidsize") to the volume, it will automatically create a new raid group to house the 2 disks beyond raidsize. Note that you cannot add n+1 disks to a volume because a raid group must have at least two disks.
For example, you create the volume "myvol" with two disks using the command "vol create myvol 2". The default "raidsize" for volumes is 14 disks. If you issue the command "vol add myvol 12", all disks will be added to the first raid group. If you then try "vol add myvol 2" it will automatically create a new raid group with 2 disks. It's that easy!
Things to be aware of:
You can not decrease the size of a raid group once it has been filled. Changing the option "raidsize" with the command "vol options <volname> raidsize <# of disks>" only changes the maximum number of disks to be added to the current non-full and future raid groups on the volume.
You can not decrease the size of a volume, a corrolary to the above point. Don't commit disks to a volume unless you're sure you don't need them for another volume, or for hot spares.
Every raid group requires one parity drive and the max "raidsize" is 28. So if you want more data protection, set "raidsize" lower. If you want to maximize the number of disks used for data over parity and are willing to risk losing the whole filesystem in the event of a double-disk failure, set "raidsize" higher.
Does that answer all your questions?
-- Jeff
--
Jeff Krueger E-Mail: jeff@qualcomm.com NetApp File Server Lead Phone: 858-651-6709 IT Engineering and Support Fax: 858-651-6627 QUALCOMM, Incorporated Web: www.qualcomm.com
-- ---------------------------------------------------------------- July A. J. Linett, VP Tech Mktg 302.266.9408 july@zerowait.com
Zerowait: Best Of Breed Internet Core Technologies Web Acceleration ** Data Storage ** Load Balancing www.zerowait.com*www.loadbalancing.net*www.nas-san.com -------------------------------------------------------------------
That is really a good description of what to do, but ... What about the situation of building a new raid on the same volume. Can I set the raid size to 13, build another raid with the 36 GB drives onto the same volume, change the raid size to 14, add one more 36 GB drive to that raid set, then add 13 more 36 GB drives to another raid set on the same volume?
I've got four shelves of 18 GB drives in two raid sets of 14 and 13 with one spare. I want to add two raid sets of 14 and 13 of the 36 GB drives with one spare for that group. ... All in the same volume. also, the four new shelves are the new ones that can handle the 36 GB drives. The result is a spare for each of the 18 and 36 drives and full shelves.
With spares and parity; I think this keeps me under the 1.4 terabyte limit on the filesystem.
At 2:57 PM -0800 3/28/00, Jeff Krueger wrote:
What a unique name, July! I hope the following helps your filer situation.
From July at Zerowait on Tue, 28 Mar 2000 15:52:57 EST:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Inherited boxes, gotta love 'em! =)
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
The reason you didn't find any language describing the procedure for creating a new raid group is because you don't have to. =)
When a volume is created, an initial raid group is created, usually with two disks - one for parity and one for data. Once you have added n+2 (where n is the "raidsize") to the volume, it will automatically create a new raid group to house the 2 disks beyond raidsize. Note that you cannot add n+1 disks to a volume because a raid group must have at least two disks.
For example, you create the volume "myvol" with two disks using the command "vol create myvol 2". The default "raidsize" for volumes is 14 disks. If you issue the command "vol add myvol 12", all disks will be added to the first raid group. If you then try "vol add myvol 2" it will automatically create a new raid group with 2 disks. It's that easy!
Things to be aware of:
- You can not decrease the size of a raid group once it has been
filled. Changing the option "raidsize" with the command "vol options <volname> raidsize <# of disks>" only changes the maximum number of disks to be added to the current non-full and future raid groups on the volume.
- You can not decrease the size of a volume, a corrolary to the above
point. Don't commit disks to a volume unless you're sure you don't need them for another volume, or for hot spares.
- Every raid group requires one parity drive and the max "raidsize" is
- So if you want more data protection, set "raidsize" lower. If you
want to maximize the number of disks used for data over parity and are willing to risk losing the whole filesystem in the event of a double-disk failure, set "raidsize" higher.
Does that answer all your questions?
-- Jeff
--
Jeff Krueger E-Mail: jeff@qualcomm.com NetApp File Server Lead Phone: 858-651-6709 IT Engineering and Support Fax: 858-651-6627 QUALCOMM, Incorporated Web: www.qualcomm.com
}}}===============>> LLNL James E. Harm (Jim); jharm@llnl.gov (925) 422-4018 Page: 423-7705x57152
From Jim Harm on Thu, 30 Mar 2000 16:00:38 PST:
That is really a good description of what to do, but ... What about the situation of building a new raid on the same volume. Can I set the raid size to 13, build another raid with the 36 GB drives onto the same volume, change the raid size to 14, add one more 36 GB drive to that raid set, then add 13 more 36 GB drives to another raid set on the same volume?
Yes. Whenever you change the raidsize on a volume (did I mention that it is a per-volume setting?) it applies to the the current raid group and any future raid groups (unless you change it again). If you set the raidsize below the size of the current raid group it will only mean that the next two disks added will create a new raid group.
I've got four shelves of 18 GB drives in two raid sets of 14 and 13 with one spare. I want to add two raid sets of 14 and 13 of the 36 GB drives with one spare for that group. ... All in the same volume. also, the four new shelves are the new ones that can handle the 36 GB drives. The result is a spare for each of the 18 and 36 drives and full shelves.
If the current raid group (that is, the one with the highest number) has QTY 13 of the 18GB disks, you could use something like this:
netapp> vol options vol0 raidsize 13 netapp> vol add vol0 2@36 (Or "vol add vol0 -d diskid1 diskid2) netapp> vol options vol0 raidsize 14 netapp> vol add vol0 12@36 (Or "vol add vol0 -d diskid3 ... diskid14) netapp> vol options vol0 raidsize 13 netapp> vol add vol0 13@36 (Or "vol add vol0 -d diskid15 ... diskid27)
Of course, you should contact your SE or NetApp tech support for assistance with this. They will probably give you something like the above.
Good luck!
-- Jeff
-- ---------------------------------------------------------------------------- Jeff Krueger E-Mail: jeff@qualcomm.com NetApp File Server Lead Phone: 858-651-6709 IT Engineering and Support Fax: 858-651-6627 QUALCOMM, Incorporated Web: www.qualcomm.com
-
G D Geen -
Jeff Krueger -
Jim Harm -
July at Zerowait -
Steve Armijo -
Tom McDonald