Re: [zfs-discuss] Using consumer drives in a zraid2

On Aug 26, 2009, at 1:17 PM, thomas wrote: Hi Richard, So you have to wait for the sd (or other) driver to timeout the request. By default, this is on the order of minutes. Meanwhile, ZFS is patiently awaiting a status on the request. For enterprise class drives, there is a limited number of

Re: [zfs-discuss] Using consumer drives in a zraid2

Hi Richard, > So you have to wait for the sd (or other) driver to > timeout the request. By > default, this is on the order of minutes. Meanwhile, > ZFS is patiently awaiting a status on the request. For > enterprise class drives, there is a limited number > of retries on the disk before it repor

Re: [zfs-discuss] Using consumer drives in a zraid2

On Wed, Aug 26, 2009 at 11:45 AM, Neal Pollack wrote: > > Luck or "design/usage" ? > Let me explain; I've also had many drives fail over the last 25 > years of working on computers, I.T., engineering, manufacturing, > and building my own PCs. > > Drive life can be directly affected by heat. Ma

Re: [zfs-discuss] Using consumer drives in a zraid2

On 08/25/09 10:46 PM, Tim Cook wrote: On Wed, Aug 26, 2009 at 12:22 AM, thomas > wrote: > I'll admit, I was cheap at first and my > fileserver right now is consumer drives.  You > can bet all my future purchases will be of the enterprise grade.  An

Re: [zfs-discuss] Using consumer drives in a zraid2

On Aug 25, 2009, at 9:38 PM, Tristan Ball wrote: What I’m worried about that time period where the pool is resilvering to the hot spare. For example: one half of a mirror has failed completely, and the mirror is being rebuilt onto the spare – if I get a read error from the remaining half of

Re: [zfs-discuss] Using consumer drives in a zraid2

But the real question is whether the "enterprise" drives would have avoided your problem. A. -- Adam Sherman +1.613.797.6819 On 2009-08-26, at 11:38, Troels Nørgaard Nielsen wrote: Hi Tim Cook. If I was building my own system again, I would prefer not to go with consumer harddrives. I h

Re: [zfs-discuss] Using consumer drives in a zraid2

>If I was building my own system again, I would prefer not to go with consumer >harddrives. >I had a raidz pool containing eight drives on a snv108 system, after >rebooting, four of >the eight drives was so broken they could not be seen by format, let alone the >zpool they >belonged to. > >This

Re: [zfs-discuss] Using consumer drives in a zraid2

Hi Tim Cook. If I was building my own system again, I would prefer not to go with consumer harddrives. I had a raidz pool containing eight drives on a snv108 system, after rebooting, four of the eight drives was so broken they could not be seen by format, let alone the zpool they belonged t

Re: [zfs-discuss] Using consumer drives in a zraid2

On Wed, 26 Aug 2009, Tristan Ball wrote: Complete disk failures are comparatively rare, while media or transient errors are far more common. As a media I/O or transient error on the It seems that this assumption is is not always the case. The expensive small-capacity SCSI/SAS enterprise driv

Re: [zfs-discuss] Using consumer drives in a zraid2

I've been running ZFS under FreeBSD which is experimental, and i've had nothing but great luckso i guess it depeneds on a number of things. I went with FreeBSD because the hardware i had wasn't supported in solarisi expected problems but honestly, it's been rock solidit's survived all

Re: [zfs-discuss] Using consumer drives in a zraid2

I'm using the Caviar Green drives in a 5-disk config. I downloaded the WDTLER utility and set all the drives to have a 7-second timeout, like the RE series have. WDTLER boots a small DOS app and you have to hit a key for each drive to adjust. So this might take time for a large raidz2. -- This

Re: [zfs-discuss] Using consumer drives in a zraid2

Here's one horror story of mine - ZFS taking over 20 minutes to flag a drive as faulty, with the entire pool responding so slowly during those 20 minutes that it crashed six virtual machines running off the pool: http://www.opensolaris.org/jive/thread.jspa?messageID=369265񚉱 There are some perfor

Re: [zfs-discuss] Using consumer drives in a zraid2

se for the cost I considered it silly not to considering the relative cost. For those periods that it is effective, it really makes a difference too! T. From: Tim Cook [mailto:t...@cook.ms] Sent: Wednesday, 26 August 2009 3:48 PM To: Tristan Ball Cc: zfs-discu

Re: [zfs-discuss] Using consumer drives in a zraid2

On Wed, Aug 26, 2009 at 12:27 AM, Tristan Ball < tristan.b...@leica-microsystems.com> wrote: > The remaining drive would only have been flagged as dodgy if the bad > sectors had been found, hence my comments (and general best practice) about > data scrub’s being necessary. While I agree it’s poss

Re: [zfs-discuss] Using consumer drives in a zraid2

On Wed, Aug 26, 2009 at 12:22 AM, thomas wrote: > > I'll admit, I was cheap at first and my > > fileserver right now is consumer drives.  You > > can bet all my future purchases will be of the enterprise grade. >  And > > guess what... none of the drives in my array are less than 5 years old, > s

Re: [zfs-discuss] Using consumer drives in a zraid2

osmosis: http://en.wikipedia.org/wiki/Osmosis :-) ) From: Tim Cook [mailto:t...@cook.ms] Sent: Wednesday, 26 August 2009 3:01 PM To: Tristan Ball Cc: thomas; zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] Using consumer drives in a zraid2 On Tue, Aug 25

Re: [zfs-discuss] Using consumer drives in a zraid2

> I'll admit, I was cheap at first and my > fileserver right now is consumer drives.  You > can bet all my future purchases will be of the enterprise grade.  And > guess what... none of the drives in my array are less than 5 years old, so > even > if they did die, and I had bought the enterprise v

Re: [zfs-discuss] Using consumer drives in a zraid2

On Tue, Aug 25, 2009 at 11:38 PM, Tristan Ball < tristan.b...@leica-microsystems.com> wrote: > Not upset as such J > > > > What I’m worried about that time period where the pool is resilvering to > the hot spare. For example: one half of a mirror has failed completely, and > the mirror is being r

Re: [zfs-discuss] Using consumer drives in a zraid2

ot up to tape. :-) Regards Tristan. From: Tim Cook [mailto:t...@cook.ms] Sent: Wednesday, 26 August 2009 2:08 PM To: Tristan Ball Cc: thomas; zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] Using consumer drives in a zraid2 On

Re: [zfs-discuss] Using consumer drives in a zraid2

On Tue, Aug 25, 2009 at 10:56 PM, Tristan Ball < tristan.b...@leica-microsystems.com> wrote: > I guess it depends on whether or not you class the various "Raid > Edition" drives as "consumer"? :-) > > My one concern with these RE drives is that because they will return > errors early rather than r

Re: [zfs-discuss] Using consumer drives in a zraid2

ay, 26 August 2009 12:55 PM To: zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] Using consumer drives in a zraid2 Are there *any* consumer drives that don't respond for a long time trying to recover from an error? In my experience they all behave this way which has been a nightmare on

Re: [zfs-discuss] Using consumer drives in a zraid2

Are there *any* consumer drives that don't respond for a long time trying to recover from an error? In my experience they all behave this way which has been a nightmare on hardware raid controllers. -- This message posted from opensolaris.org ___ zfs-d

Re: [zfs-discuss] Using consumer drives in a zraid2

Is there a formula to determine the optimal size of dedicated cache space for zraid systems to improve speed? -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listin

Re: [zfs-discuss] Using consumer drives in a zraid2

On Aug 24, 2009, at 11:10 AM, Ron Mexico wrote: I'm putting together a 48 bay NAS for my company [24 drives to start]. My manager has already ordered 24 2TB [b]WD Caviar Green[/b] consumer drives - should we send these back and order the 2TB [b]WD RE4-GP[/b] enterprise drives instead? I w

[zfs-discuss] Using consumer drives in a zraid2

I'm putting together a 48 bay NAS for my company [24 drives to start]. My manager has already ordered 24 2TB [b]WD Caviar Green[/b] consumer drives - should we send these back and order the 2TB [b]WD RE4-GP[/b] enterprise drives instead? I'm tempted to try these out. First off, they're about $