Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-21 Thread zfs ml
On 3/21/10 4:19 AM, Robin Axelsson wrote: The motherboard is AMD based and it has two controllers; one OnChip controller that is integrated into the SouthBridge chip (SB750) and an OnBoard controller using the JMicron JMB362 chip and a JMB322 port multiplier. Both controllers supports both AHC

Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-21 Thread Robin Axelsson
The motherboard is AMD based and it has two controllers; one OnChip controller that is integrated into the SouthBridge chip (SB750) and an OnBoard controller using the JMicron JMB362 chip and a JMB322 port multiplier. Both controllers supports both AHCI and Native IDE mode which can be configure

Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-20 Thread Bob Friesenhahn
On Sat, 20 Mar 2010, Robin Axelsson wrote: My idea is rather that the "hot spares" (or perhaps we should say "cold spares" then) are off all the time until they are needed or when a user initiated/scheduled system integrity check is being conducted. They could go up for a "test spin" at each o

Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-20 Thread Tonmaus
> I know about those SoHo boxes and the whatnot, they > keep spinning up and down all the time and the worst > thing is that you cannot disable this sleep/powersave > feature on most of these devices. That to judge is in the eye of the beholder. We have a couple of Thecus NAS boxes and some LVM R

Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-20 Thread Robin Axelsson
I know about those SoHo boxes and the whatnot, they keep spinning up and down all the time and the worst thing is that you cannot disable this sleep/powersave feature on most of these devices. I believe I have seen a "sleep mode" support when I skimmed through the feature lists of the LSI contro

Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-20 Thread Tonmaus
> So, is there a > sleep/hibernation/standby mode that the hot spares > operate in or are they on all the time regardless of > whether they are in use or not? This depends on the power-save options of your hardware, not on ZFS. Arguably, there is less ware on the heads for a hot spare. I guess th

Re: [zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-19 Thread Khyron
Responses inline... On Tue, Mar 16, 2010 at 07:35, Robin Axelsson wrote: > I've been informed that newer versions of ZFS supports the usage of hot > spares which is denoted for drives that are not in use but available for > resynchronization/resilvering should one of the original drives fail in t

[zfs-discuss] Usage of hot spares and hardware allocation capabilities.

2010-03-16 Thread Robin Axelsson
I've been informed that newer versions of ZFS supports the usage of hot spares which is denoted for drives that are not in use but available for resynchronization/resilvering should one of the original drives fail in the assigned storage pool. I'm a little sceptical about this because even the