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тАО02-27-2001 09:44 AM
тАО02-27-2001 09:44 AM
I have a SC10 with 8 disks. I will use Raid5 on them.
Could anyone give an input about why and when should I consider setting a hot spare disk in this situation? What are the pros and cons of a hot spare in my case?
Thanks!
Brian
Solved! Go to Solution.
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тАО02-28-2001 01:35 AM
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тАО02-28-2001 01:38 AM
тАО02-28-2001 01:38 AM
Re: Hot Spare in SC10
This is the second doc.
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тАО02-28-2001 05:59 AM
тАО02-28-2001 05:59 AM
Re: Hot Spare in SC10
Fist of all, I'd like to make sure that you're talking about SC10 only because SC10 is not an array but just a bunch of disks.
If you mentioned FC60 with one SC10, I would say that a single disk enclosure (SC10) configuration is not recommended in high availability environments. That's because BCC within SC10 is not a hot-swappable component, which indicates that you must power off SC10 when you replace BCC.
For RAID 5, one disk's worth of capacity from each LUN is required to store parity data.
So if one disk from each LUN failed, data and parity from the remaining disks are used to rebuild the contents of the failed disk but one more disk is failed again before replacement, you would lose your data.
Hot spare disk is used as a replacement disk if a data disk fails.
When a disk fails, the disk array begins rebuilding the failed disk's data on an available hot spare.
as a result, Hot spare are an essential for maintaining high availability and reduce the risk of a second disk failure and restore the disk array performance.
Best regards,
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тАО02-28-2001 07:23 AM
тАО02-28-2001 07:23 AM
Re: Hot Spare in SC10
Gil, could you please post again the first doc. I could not download it.
In Su kim, you went right on the issue.