Re: [zfs-discuss] 3TB HDD in ZFS
On Tue, Dec 7, 2010 at 11:37 PM, Eugen Leitl eu...@leitl.org wrote: What about Hitachi HDS723030ALA640 (aka Deskstar 7K3000, claimed 24/7)? The spec sheets claim 512b sectors, so hopefully it'll work. There's a lot more info to support that at http://www.hitachigst.com/internal-drives/desktop/deskstar/deskstar-7k3000 as well. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On Mon, Dec 6, 2010 at 7:10 PM, taemun tae...@gmail.com wrote: Sorry, you're right. If they're using 512B internally, this is a non-event here. I think that most folks talking about 3TB drives in this list are looking for internal drives. That the desktop dock (USB, I presume) coalesces blocks doesn't really make any difference. It's a shame that Seagate doesn't sell their 3TB drive bare, but right now it's cheaper by about $30 to buy the 7200 rpm Seagate and throw away the desktop dock than it is to buy a WD EARS drive. Consider it a fancy anti-shock packaging. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On Tue, Dec 07, 2010 at 05:17:08PM -0800, Brandon High wrote: On Mon, Dec 6, 2010 at 7:10 PM, taemun tae...@gmail.com wrote: Sorry, you're right. If they're using 512B internally, this is a non-event here. I think that most folks talking about 3TB drives in this list are looking for internal drives. That the desktop dock (USB, I presume) coalesces blocks doesn't really make any difference. It's a shame that Seagate doesn't sell their 3TB drive bare, but right now it's cheaper by about $30 to buy the 7200 rpm Seagate and throw away the desktop dock than it is to buy a WD EARS drive. Consider it a fancy anti-shock packaging. What about Hitachi HDS723030ALA640 (aka Deskstar 7K3000, claimed 24/7)? -- Eugen* Leitl a href=http://leitl.org;leitl/a http://leitl.org __ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
- Original Message - Hi, Anyone who has experience with 3TB HDD in ZFS? Can solaris recognize this new HDD? I haven't tested them, but we're using multi-terabyte iscsi volumes now, so I don't really see what could be different. The only possible issue I know of, is that 3TB drives uses 4k sectors, which might not be optimal in all environments. Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
I haven't tested them, but we're using multi-terabyte iscsi volumes now, so I don't really see what could be different. The only possible issue I know of, is that 3TB drives uses 4k sectors, which might not be optimal in all environments. Vennlige hilsener / Best regards 3TB HDD needs UEFI not the traditional BIOS and OS support. Fred ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On 6 December 2010 21:43, Fred Liu fred_...@issi.com wrote: 3TB HDD needs UEFI not the traditional BIOS and OS support. Fred Fred: http://www.anandtech.com/show/3858/the-worlds-first-3tb-hdd-seagate-goflex-desk-3tb-review/2 Namely: a feature of GPT is 64-bit LBA support. With 64-bit LBAs the largest 512-byte sector drive we can address is 9.4ZB GPT drives are supported as data drives in all x64 versions of Windows as well as Mac OS X and Linux. You’ll note that I said data and not boot drives. In order to boot to a GPT partition, you need hardware support. I just mentioned that your PC’s BIOS looks at LBA 0 for the MBR. Your BIOS does not support booting to GPT partitioned drives. GPT is however supported by systems that implement a newer BIOS alternative: Intel’s Extensible Firmware Interface (EFI). I would imagine that anyone looking at this list didn't want the 3TB drive as a boot drive (rpool), but as a data drive. Cheers, ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On 12/06/2010 05:17 AM, taemun wrote: On 6 December 2010 21:43, Fred Liu fred_...@issi.com mailto:fred_...@issi.com wrote: 3TB HDD needs UEFI not the traditional BIOS and OS support. Fred Fred: http://www.anandtech.com/show/3858/the-worlds-first-3tb-hdd-seagate-goflex-desk-3tb-review/2 Namely: a feature of GPT is 64-bit LBA support. With 64-bit LBAs the largest 512-byte sector drive we can address is 9.4ZB GPT drives are supported as data drives in all x64 versions of Windows as well as Mac OS X and Linux. You’ll note that I said data and not boot drives. In order to boot to a GPT partition, you need hardware support. I just mentioned that your PC’s BIOS looks at LBA 0 for the MBR. Your BIOS does not support booting to GPT partitioned drives. GPT is however supported by systems that implement a newer BIOS alternative: Intel’s Extensible Firmware Interface (EFI). I would imagine that anyone looking at this list didn't want the 3TB drive as a boot drive (rpool), but as a data drive. Cheers, 64-bit versions of windows 7/vista can boot off GPT volumes. Microsoft made a lot of BS excuses on why you couldn't boot off GPT but linux has been able to boot off GPT via grub for like forever (32 and 64-bit) even on older hardware. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On Sun, Dec 5, 2010 at 9:35 PM, Fred Liu fred_...@issi.com wrote: Anyone who has experience with 3TB HDD in ZFS? Can solaris recognize this new HDD? There shouldn't be any problems using a 3TB drive with Solaris, so long as you're using a 64-bit kernel. Recent versions of zfs should properly recognize the 4k sector size as well. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On 7 December 2010 13:25, Brandon High bh...@freaks.com wrote: There shouldn't be any problems using a 3TB drive with Solaris, so long as you're using a 64-bit kernel. Recent versions of zfs should properly recognize the 4k sector size as well. I think you'll find that these 3TB, 4KiB physical sector drives are still exporting logical sectors of 512B (this is what Anandtech has indicated, anyway). ZFS assumes that the drives logical sectors are directly mapped to physical sectors, and will create an ashift=9 vdev for the drives. Hence why enthusiasts are making their own zpool binaries with a hardcoded ashift=12 so they can create pools that actually function beyond 20 random writes per second with these drives: http://digitaldj.net/2010/11/03/zfs-zpool-v28-openindiana-b147-4k-drives-and-you/ Cheers, ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
It's based on a jumper on most new drives. On Dec 6, 2010 8:41 PM, taemun tae...@gmail.com wrote: On 7 December 2010 13:25, Brandon High bh...@freaks.com wrote: There shouldn't be any problems using a 3TB drive with Solaris, so long as you're using a 64-bit kernel. Recent versions of zfs should properly recognize the 4k sector size as well. I think you'll find that these 3TB, 4KiB physical sector drives are still exporting logical sectors of 512B (this is what Anandtech has indicated, anyway). ZFS assumes that the drives logical sectors are directly mapped to physical sectors, and will create an ashift=9 vdev for the drives. Hence why enthusiasts are making their own zpool binaries with a hardcoded ashift=12 so they can create pools that actually function beyond 20 random writes per second with these drives: http://digitaldj.net/2010/11/03/zfs-zpool-v28-openindiana-b147-4k-drives-and-you/ Cheers, ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On Mon, Dec 6, 2010 at 6:40 PM, taemun tae...@gmail.com wrote: I think you'll find that these 3TB, 4KiB physical sector drives are still exporting logical sectors of 512B (this is what Anandtech has indicated, anyway). ZFS assumes that the drives logical sectors are directly mapped to physical sectors, and will create an ashift=9 vdev for the drives. It depends on the drive. According to Anandtech, the WD drives use 4k internally but report 512b sectors. They also report that the Seagate GoFlex uses 512b sectors internally but reports 4k sectors through it's desktop dock. So the WD drives should work, and the Seagate drive should work but both of them lie about their abilities. Waiting for a 3TB drive that properly reports it capabilities to become available is probably the best course of action. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] 3TB HDD in ZFS
On 7 December 2010 13:55, Tim Cook t...@cook.ms wrote: It's based on a jumper on most new drives. Can you back that up with anything? I've never seen anything but requests for a jumper that forces the firmware to export 4KiB sectors. WD EARS at launch provided the ability to force the requested LBA to be written to disk as LBA + 1 (a workaround to get Windows XP to make aligned partitions), as per http://www.anandtech.com/show/2888/2 On 7 December 2010 13:57, Brandon High bh...@freaks.com wrote: It depends on the drive. According to Anandtech, the WD drives use 4k internally but report 512b sectors. And hence, will incorrectly create an ashift=9 vdev. They also report that the Seagate GoFlex uses 512b sectors internally but reports 4k sectors through it's desktop dock. Sorry, you're right. If they're using 512B internally, this is a non-event here. I think that most folks talking about 3TB drives in this list are looking for internal drives. That the desktop dock (USB, I presume) coalesces blocks doesn't really make any difference. Waiting for a 3TB drive that properly reports it capabilities to become available is probably the best course of action. Buying 4KiB physical sector drives which export 512B sectors is fine, as long as you use a modified binary which has a hardcoded ashift=12 value. Otherwise, you're asking for trouble (and terrible performance). Cheers, ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] 3TB HDD in ZFS
Hi, Anyone who has experience with 3TB HDD in ZFS? Can solaris recognize this new HDD? Thanks. Fred ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
