Actually, spares don't count as far as the software limits are concerned. Data Ontap will prevent you adding disks to a live volume if you are hitting the volume or total filer storage limits, but the number of hot spares is only limited by the available id's on the FCAL loop.
Tested on Data OnTap 6.2.2 and Data Ontap 6.3
regards,
Alan McLachlan Senior Systems Engineer Storage Management Solutions ASI Solutions www.asi.com.au Ph +61 2 6230 1566 Fax +61 2 6230 5343 Mobile +61 428 655644 e-mail amclachlan@asi.com.au
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-----Original Message----- From: Jacek Nogala [mailto:jacek.nogala@solidex.com.pl] Sent: Thursday, 23 January 2003 9:16 PM To: toasters@mathworks.com Cc: Charles Bartels Subject: ODP: Spare disks and SnapRestore
The first is regarding spare disks. I'm going to have a fully loaded
F810 soon;
2 shelves with a total of twenty-one 72GB drives. Since I will have
spare slots
in the shelves I was wondering if I can setup the netapp with a 22nd
drive as a
hot-spare instead of "wasting" one out of my 21 disk pool. The specs on
the F810
say it maxes out at 1.5 TB raw which I will be hitting with the 21
drives.
AFAIK 1.5 TB storage limit includes all installed disks. It means that 22 disk configuration for F810 is definitely not supported by NetApp and it is probably not working (some limits are enforced with Data ONTAP - I am not sure if this as well).
And a much more general question; what does SnapRestore do? I believe this is a separately licensed option and I haven't really been able to glean too much from the Netapp website.
SnapRestore enables you instant reversion to the selected snapshot state of the whole volume (all Data ONTAPs) or single file (Data ONTAP 6.2 or later). "Instant" means without copying data. Actually only necessary pointers are copied. You have to be aware of the following drawbacks: - It is one-way trip (you are loosing all SnapShot copies that were collected after the SnapShot that you selected for reversion). - SnapRestoring of single file has negative performance impact (this operation causes fragmentation of WAFL file system).
I hope this helps.
Best regards,
Jacek Nogala
--------------------------------------------------------------------------- Jacek Nogala __________ Inzynier Konsultant /______/__/ Al. Jerozolimskie 65/79 NetApp Certified Professional (Filer) ________/ 00-697 Warszawa, Poland jacek.nogala@solidex.com.pl /______/__/ Tel: +48 (22) 630 66 11 http://www.solidex.com.pl SOLIDEX S.A. Fax: +48 (22) 630 66 13 ---------------------------------------------------------------------------
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