how true is this and what are your experiences?
http://wiki.nas4free.org/doku.php?id=warnings
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ZFS and Spin-down HDD's
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neptunus
- experienced User
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Eldor1
- Starter
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- Joined: 14 Jul 2012 10:14
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Re: ZFS and Spin-down HDD's
Hi!
I can confirm this, cause I simply tried it with a ZFS-R1 (4x HDD). And boy ZFS didn't liked it!!!
Had a quite hard time to undo this setting. The Main-reason is in my opinion the raid-function i used. Maybe it works, if every HDD is a foreign Pool/vdev. But then ZFS makes not really sense anymore...
Have a nice day!
I can confirm this, cause I simply tried it with a ZFS-R1 (4x HDD). And boy ZFS didn't liked it!!!
Had a quite hard time to undo this setting. The Main-reason is in my opinion the raid-function i used. Maybe it works, if every HDD is a foreign Pool/vdev. But then ZFS makes not really sense anymore...
Have a nice day!
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dnar
- Starter
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- Joined: 27 Apr 2013 10:38
- Location: Perth Australia
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Re: ZFS and Spin-down HDD's
I have been spinning down drives in a 6 drive Z2 array and also a 7 drive Z1 for years without issues. I use a 120 minute timeout.
NAS 1: NAS4Free 9.3.0.2 x64 embedded, Intel Core 2 E8400, 8GB, 6 x WD Green 1TB in RAIDZ2, Highpoint 2720 SAS x 8 card 6Gbps
NAS 2: NAS4Free 10.2.0.2 x64 embedded, Intel Core i3-3220, 8GB, 7 x WD Green 750GB in RAIDZ1, onboard SATA 3Gbps
NAS 2: NAS4Free 10.2.0.2 x64 embedded, Intel Core i3-3220, 8GB, 7 x WD Green 750GB in RAIDZ1, onboard SATA 3Gbps
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b0ssman
- Forum Moderator
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Re: ZFS and Spin-down HDD's
i am also spinning down my discs.
if the spinup time is bigger than the timeout of zfs waiting for the disk, then i could see how that would be bad.
anyone know what that timeout is with zfs?
if the spinup time is bigger than the timeout of zfs waiting for the disk, then i could see how that would be bad.
anyone know what that timeout is with zfs?
Nas4Free 11.1.0.4.4517. Supermicro X10SLL-F, 16gb ECC, i3 4130, IBM M1015 with IT firmware. 4x 3tb WD Red, 4x 2TB Samsung F4, both GEOM AES 256 encrypted.
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dnar
- Starter
- Posts: 65
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- Location: Perth Australia
- Status: Offline
Re: ZFS and Spin-down HDD's
From memory, there are no I/O timeouts within ZFS itself. ZFS will hang indefinitely.b0ssman wrote:i am also spinning down my discs.
if the spinup time is bigger than the timeout of zfs waiting for the disk, then i could see how that would be bad.
anyone know what that timeout is with zfs?
Just as with TLER, spun down disks don't cause an issue that I am aware of.
NAS 1: NAS4Free 9.3.0.2 x64 embedded, Intel Core 2 E8400, 8GB, 6 x WD Green 1TB in RAIDZ2, Highpoint 2720 SAS x 8 card 6Gbps
NAS 2: NAS4Free 10.2.0.2 x64 embedded, Intel Core i3-3220, 8GB, 7 x WD Green 750GB in RAIDZ1, onboard SATA 3Gbps
NAS 2: NAS4Free 10.2.0.2 x64 embedded, Intel Core i3-3220, 8GB, 7 x WD Green 750GB in RAIDZ1, onboard SATA 3Gbps