Hi,
We have the following situation: A 3020c with 3 FC shelves (with 144G disks), and 2 SATA shelves. one head has the FC ones, the other ownes the SATA ones. For some reason 2 of the FC shelves are only half-filled and we would like to buy larger FC disks.
*) is it possible to intermix different sized disks in one aggregate? (i think so) *) is it possible to intermix different sized disks in one shelf? eg. 7 144G disks and 7 larger disks in one shelf. i dont think so, without loosing the extra space. at least in the past this was not possible with older versions of ontap, if i read the older posts correctly.
*) is it possible to move 7 disks from one shelf to the other half-filled shelf without data loss and interruption? then i would have 2 full shelves and one empty shelf and could ad the new disks to that empty shelf (and the same aggregate).
yours josef
You'd have to make sure the larger disks are in a different raid group then the 144g disks are. You can have different sized disks in the same shelf. You'd only loose space if the larger disks are in the same raidgroup, the shelf doesn't matter. I feel required to note that SATA disks and FC disks can't coexist in the same shelf (yet?) so you have to stick with FC disks.
You can't move the disks without interruption in service, but you can move them fairly quickly. Just shut the system down, schedule an outage window or whatever procedure for your site. Turn off the system and reshuffle the disks as you will. Then power the system on again. WAFL's raid data is kept on disk, so moving them around on the same system is really that easy. SE's demo that at customer sites sometimes.
-Blake
On 8/6/07, Josef Radinger josef.radinger@i-med.ac.at wrote:
Hi,
We have the following situation: A 3020c with 3 FC shelves (with 144G disks), and 2 SATA shelves. one head has the FC ones, the other ownes the SATA ones. For some reason 2 of the FC shelves are only half-filled and we would like to buy larger FC disks.
*) is it possible to intermix different sized disks in one aggregate? (i think so) *) is it possible to intermix different sized disks in one shelf? eg. 7 144G disks and 7 larger disks in one shelf. i dont think so, without loosing the extra space. at least in the past this was not possible with older versions of ontap, if i read the older posts correctly.
*) is it possible to move 7 disks from one shelf to the other half-filled shelf without data loss and interruption? then i would have 2 full shelves and one empty shelf and could ad the new disks to that empty shelf (and the same aggregate).
yours josef
-- MfG Josef Radinger it-services Medizinische Universitaet Innsbruck
Hi Josef,
to you questions:
1) yes it is possible to mix...BUT if you have different sized disks in one raid-group the bigger disk will only serve the space of the smaller onces.
2) Yes it is possible. I am not aware of restrictions from Ontap but i must admit that i only know 7.x versions. The otherones are too old for me ;)
3) When you have a filer-shutdown and then move the disk it should not be a problem. In the running process you only can do this when you have a spare disks. So you could do the following:
Remove one disk from shelf 2 and add it to shelf1. Spare disk in Shelf 1 becomes active. New added disk in shelf 1 becomes new spare. Wait for the reconstruct to finish.
Remove next disk from shelf2 and add it to shelf 1. New Spare disk (from step1) becomes active. New added disk in shelf 1 becomes new spare. Wait for the reconstruct to finish.
and so on....Very long procedure but should work when you take care of the reconstruct.
Best Regards and good luck with your change
___________________________________ Jochen Willeke
Wincor Nixdorf Heinz Nixdorf Ring 1 33106 Paderborn CIO 4
Tel.: +49 (5251) 693 4228 ___________________________________
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Josef Radinger Sent: Tuesday, August 07, 2007 8:57 AM To: toasters@mathworks.com Subject: moving disks from one shelf to another
Hi,
We have the following situation: A 3020c with 3 FC shelves (with 144G disks), and 2 SATA shelves. one head has the FC ones, the other ownes the SATA ones. For some reason 2 of the FC shelves are only half-filled and we would like to buy larger FC disks.
*) is it possible to intermix different sized disks in one aggregate? (i think so) *) is it possible to intermix different sized disks in one shelf? eg. 7 144G disks and 7 larger disks in one shelf. i dont think so, without loosing the extra space. at least in the past this was not possible with older versions of ontap, if i read the older posts correctly.
*) is it possible to move 7 disks from one shelf to the other half-filled shelf without data loss and interruption? then i would have 2 full shelves and one empty shelf and could ad the new disks to that empty shelf (and the same aggregate).
yours josef
Sorry for the answer...
a hint from a colleague was to do a Disk replace instead of a reconstruct.
Best Regards
Jochen
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Willeke, Jochen Sent: Tuesday, August 07, 2007 10:20 AM To: Josef Radinger; toasters@mathworks.com Subject: RE: moving disks from one shelf to another
Hi Josef,
to you questions:
1) yes it is possible to mix...BUT if you have different sized disks in one raid-group the bigger disk will only serve the space of the smaller onces.
2) Yes it is possible. I am not aware of restrictions from Ontap but i must admit that i only know 7.x versions. The otherones are too old for me ;)
3) When you have a filer-shutdown and then move the disk it should not be a problem. In the running process you only can do this when you have a spare disks. So you could do the following:
Remove one disk from shelf 2 and add it to shelf1. Spare disk in Shelf 1 becomes active. New added disk in shelf 1 becomes new spare. Wait for the reconstruct to finish.
Remove next disk from shelf2 and add it to shelf 1. New Spare disk (from step1) becomes active. New added disk in shelf 1 becomes new spare. Wait for the reconstruct to finish.
and so on....Very long procedure but should work when you take care of the reconstruct.
Best Regards and good luck with your change
___________________________________ Jochen Willeke
Wincor Nixdorf Heinz Nixdorf Ring 1 33106 Paderborn CIO 4
Tel.: +49 (5251) 693 4228 ___________________________________
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Josef Radinger Sent: Tuesday, August 07, 2007 8:57 AM To: toasters@mathworks.com Subject: moving disks from one shelf to another
Hi,
We have the following situation: A 3020c with 3 FC shelves (with 144G disks), and 2 SATA shelves. one head has the FC ones, the other ownes the SATA ones. For some reason 2 of the FC shelves are only half-filled and we would like to buy larger FC disks.
*) is it possible to intermix different sized disks in one aggregate? (i think so) *) is it possible to intermix different sized disks in one shelf? eg. 7 144G disks and 7 larger disks in one shelf. i dont think so, without loosing the extra space. at least in the past this was not possible with older versions of ontap, if i read the older posts correctly.
*) is it possible to move 7 disks from one shelf to the other half-filled shelf without data loss and interruption? then i would have 2 full shelves and one empty shelf and could ad the new disks to that empty shelf (and the same aggregate).
yours josef
-
Blake Golliher -
Josef Radinger -
Willeke, Jochen