Hi all I have about 350TB on ZFS now, and with an old box with WD Greens (those getting replaced as of now), I''ve had very little drive failures. iostat -en shows a minimum of errors, and all is well. Then, the new 100TB setups are based on FASS drives (2TB WD Blacks). Those seem to be rather worse in the terms of expected age. We''ve replaced seven so far, out of 158 in total, so it''s not that bad, but even the newer ones seem to show high error rates. Some of the drives that have been returned, have shown no errors with WD''s tools. So, does anyone know which drives to choose for the next setup? Hitachis look good so far, perhaps also seagates, but right now, I''m dubious about the blacks. Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 roy at karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et element?rt imperativ for alle pedagoger ? unng? eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer p? norsk.
On Feb 24, 2011, at 20:11, Roy Sigurd Karlsbakk wrote:> So, does anyone know which drives to choose for the next setup? Hitachis look good so far, perhaps also seagates, but right now, I''m dubious about the blacks.There are people who have lost data on Seagates, and so swear they''ll never use them again; there are people who have lost data on Hitachis, and so swear they''ll never use them again; there are people?. I have a bunch of Seagates that I''m using to clone the internal drive (Seagate) of my iMac for offsite backup purposes. No problems, but only minima use really. Generally get the drive with the longest warranty period: this is usually an indication that the manufacturer is willing to put their money where their mouth is when it comes to longevity claims. Of course WD FASS Black devices come with five year warranties, and that doesn''t seem to be helping you much. :)
> So, does anyone know which drives to choose for the next setup? Hitachis look good so far, perhaps also seagates, but right now, I''m dubious about the > blacks.Hi! I''d go for WD RE edition. Blacks and Greens are for desktop use and therefore lack proper TLER settings and have useless power saving features that could induce errors and mysterious slowness. Yours Markus Kovero
I''d pick samsung and use the savings for additional redundancy. Ymmv. On Feb 25, 2011 8:46 AM, "Markus Kovero" <Markus.Kovero at nebula.fi> wrote:>> So, does anyone know which drives to choose for the next setup? Hitachislook good so far, perhaps also seagates, but right now, I''m dubious about the > blacks.> > Hi! I''d go for WD RE edition. Blacks and Greens are for desktop use andtherefore lack proper TLER settings and have useless power saving features that could induce errors and mysterious slowness.> > Yours > Markus Kovero > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20110225/6581ab52/attachment.html>
On Thu, Feb 24, 2011 at 10:45 PM, Markus Kovero <Markus.Kovero at nebula.fi> wrote:> Hi! I''d go for WD RE edition. Blacks and Greens are for desktop use and therefore lack proper TLER settings and have useless power saving features that could induce errors and mysterious slowness.There has been a lot of discussion about TLER in the past, and I''m less convinced that it''s a requirement for zfs than I used to think. I''ve been using WD Green (EADS) drives for two years without issue. They are ones that sleep and TLER settings could be changed on though. Many of the new WD Green drives (including some of the RE) use 4k sectors, which will wreak havoc on zpool performance. Other manufacturers are starting to use 4k sectors on their 5400 rpm drives as well so shop carefully if you decide to go with a lower spindle speed. I have not seen a 7200 rpm drive with 4k sectors, but I''m sure they exist. -B -- Brandon High : bhigh at freaks.com