AFF

Minimum Hot Spare Count?

jae85

Hi,

 

We have 24 SSD's in our AFF-A200. We wanted to use one hot spare while we were configuring the aggregate,  but we could not set it to less than two. Of course, having a sufficient amount of hot spare is always the best practice. However, since each disk has relative a large capacity, we also need to compromise on the efficiency of the capacity so we could have more usable capacity. I wonder if it's possible to have only one hot spare.

6 REPLIES 6

SpindleNinja

On the A200, you'll have 1 "physical"  disk used as a spare.  But due to RD2 (root-data-data) partitioning,  the spare partitions will be spread out throughout the filer.  

jae85

So, I assume that it is possible to have a hot spare disk. Currently, we have 2 physical disks are used as hot spares. Can I assign one of them into the data partition?

SpindleNinja

can you post the output of "storage aggregate show-spare-disks" 

jae85

::> storage aggregate show-spare-disks

Original Owner: sjsfiler_1
Pool0
Spare Pool

Usable Physical
Disk Type Class RPM Checksum Size Size Sta tus
---------------- ------ ----------- ------ -------------- -------- -------- --- -----
1.0.23 SSD solid-state - block 3.49TB 3.49TB zer oed

Original Owner: sjsfiler_1
Pool0
Root-Data1-Data2 Partitioned Spares
Local Local
Data Root Phy sical
Disk Type Class RPM Checksum Usable Usable Size Status
---------------- ------ ----------- ------ -------------- -------- -------- --- ----- --------
1.0.18 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.19 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.20 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.21 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.22 SSD solid-state - block 0B 143.7GB 3.49TB zeroed

Original Owner: sjsfiler_2
Pool0
Spare Pool

Usable Physical
Disk Type Class RPM Checksum Size Size Status
---------------- ------ ----------- ------ -------------- -------- -------- --------
1.0.17 SSD solid-state - block 3.49TB 3.49TB zeroed

Original Owner: sjsfiler_2
Pool0
Root-Data1-Data2 Partitioned Spares
Local Local
Data Root Physical
Disk Type Class RPM Checksum Usable Usable Size Status
---------------- ------ ----------- ------ -------------- -------- -------- -------- --------
1.0.12 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.13 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.14 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.15 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
1.0.16 SSD solid-state - block 0B 143.7GB 3.49TB zeroed
12 entries were displayed.

 

Thanks!

 

SpindleNinja

can you also post the following output "storage disk show -partition-ownership" 

SpindleNinja

not sure what happened to the other comment you made,  but it looks like you have 2 disks that are owned and  "whole" and not partitioned, at most you should only have one i believe if a disk should ever fail.     what happens if you try and grow an aggr? 

 

See the attached image,  it'll show visually how an AFF with 1 shelf of disks should look.  

 

 

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