I have a pool that is degraded. I inherited this pool and did not configure it. What is unclear is why I have a failed spare that has caused my pool to be degraded. As I understand, the spares that were attached to the pool should replace the failed drive. 1) Why has this not happened? 2) and why does the UI not allow me to replace a failed spare with another spare? Please see the following pool status:
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Understanding Spare errors
- Thread starter kolya1972
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- May 17, 2014
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Your formatting is off, please use CODE tags, instead of quote. This is important because I am 99% sure the output is simply showing you NORMAL ZFS spare usage.
For example, if your output is this;
That shows that you have a SPARE disk taking over the function of one of the RAID-Z3 disks. It sort of shows it as a Mirror, labeled as "spare-2".
All that would be normal. Either replace the FAULTED disk. Or cause the SPARE disk to become a permanent part of the RAID-Z3.
By the way, depending on amount of RAM and the L2ARC Cache device sizes, you may want to re-think having 3 L2ARC Cache devices. General rule of thumb is L2ARC Cache size is about 5 times RAM size. Going up to 10 times if you push it. Adding far too much simply does not work as RAM is needed for the pointers to data in the L2ARC Cache devices. Thus, you may be robbing Peter, (aka RAM), to pay Paul, (aka L2ARC).
For example, if your output is this;
Code:
NAME STATE READ WRITE CKSUM
NewStorage DEGRADED 0 0 0
raidz3-0 DEGRADED 0 0 0
gptid/9a3e5f8d-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9b1cffb8-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
spare-2 DEGRADED 0 0 0
gptid/9b77df39-91f1-11ed-8a2c-0cc47aded37e FAULTED 71 0 0 too many errors
gptid/9e947455-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9bbe8320-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9c0ef01d-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9b9f7eeb-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9bd58fb0-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9c710efc-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9c61c43a-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9d11c582-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9d769ba9-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9dca128d-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
cache
gptid/9d229645-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9dd23b35-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
gptid/9d9a3b57-91f1-11ed-8a2c-0cc47aded37e ONLINE 0 0 0
spares
gptid/9e947455-91f1-11ed-8a2c-0cc47aded37e INUSE currently in use
gptid/9f286bae-91f1-11ed-8a2c-0cc47aded37e AVAIL
gptid/9fafd1bf-91f1-11ed-8a2c-0cc47aded37e AVAIL
gptid/a07b7bf9-91f1-11ed-8a2c-0cc47aded37e AVAIL
errors: No known data errorsThat shows that you have a SPARE disk taking over the function of one of the RAID-Z3 disks. It sort of shows it as a Mirror, labeled as "spare-2".
All that would be normal. Either replace the FAULTED disk. Or cause the SPARE disk to become a permanent part of the RAID-Z3.
By the way, depending on amount of RAM and the L2ARC Cache device sizes, you may want to re-think having 3 L2ARC Cache devices. General rule of thumb is L2ARC Cache size is about 5 times RAM size. Going up to 10 times if you push it. Adding far too much simply does not work as RAM is needed for the pointers to data in the L2ARC Cache devices. Thus, you may be robbing Peter, (aka RAM), to pay Paul, (aka L2ARC).
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