Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
2012-03-07 17:21, Edward Ned Harvey wrote: From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of luis Johnstone As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) I think what you mean to ask is Is the HD7K3000 a piece of junk? Because any disk which is lying about its physical sectors is a piece of junk, regardless of what filesystem is going to be on it. This isn't a ZFS question. (Nothing wrong with asking - I'm not trying to discourage having the discussion, but please don't associate such problems with ZFS as if ZFS is unique in that way.) Well, of the currently-used FSes, ZFS does have certain issues with 4k drives, which make it rather unique. Table/bitmap based FSes like NTFS or FAT can preallocate their file-allocation tables and don't have any metadata overhead compared to 512b-sectored disks. In part this is due to having 4kb clusters as default for quite a while, so no expectations of users change. ZFS tree has many small nodes as well as file tails, so it can effectively utilize small 512b blocks on disks. When you migrate same pool to ashift=12, it explodes to require more disk space (from several percent up to ten-twenty, according to internet rumours). Users don't often expect that, so it is sorts of an issue. While it can be speculated that other FSes already steal this slack space from users on any other drives, this change of behavior on ZFS on different drive types can be seen as a drawback, by some. //Jim ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
We're using Hitachi HDS723030ALA640 on this rather busy server, and they've been stable for about a year - I don't even think we've lost any yet (out of 22) roy - Opprinnelig melding - Greetings, Quick question: I am about to acquire some disks for use with ZFS (currently using zfs-fuse v0.7.0). I'm aware of some 4k alignment issues with Western Digital advanced format disks. As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) Can someone confirm this or point out any other known issues with the disks? I will be using the disks raw, unpartitioned. Many thanks, Luis. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 98013356 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] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of luis Johnstone I am about to acquire some disks for use with ZFS (currently using zfs-fuse v0.7.0). I'm aware of some 4k alignment issues with Western Digital advanced format disks. As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) I think what you mean to ask is Is the HD7K3000 a piece of junk? Because any disk which is lying about its physical sectors is a piece of junk, regardless of what filesystem is going to be on it. This isn't a ZFS question. (Nothing wrong with asking - I'm not trying to discourage having the discussion, but please don't associate such problems with ZFS as if ZFS is unique in that way.) ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
Hi Brandon, On Mon, Mar 5, 2012 at 9:52 AM, luis Johnstone l...@luisjohnstone.commailto:l...@luisjohnstone.com wrote: As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) Both the 7K3000 and 5K3000 drives have 512B physical sectors. Do you or anyone else have experience with the 3TB 5K3000 drives (namely HDS5C3030ALA630)? I am thinking of replacing my current 4*1TB drives with 4*3TB drives (home server). Any issues with TER or alike? Kind regards, JP ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
On Tue, Mar 6, 2012 at 05:40, Koopmann, Jan-Peter jan-pe...@koopmann.eu wrote: Hi Brandon, On Mon, Mar 5, 2012 at 9:52 AM, luis Johnstone l...@luisjohnstone.com wrote: As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) Both the 7K3000 and 5K3000 drives have 512B physical sectors. Do you or anyone else have experience with the 3TB 5K3000 drives (namely HDS5C3030ALA630)? I am thinking of replacing my current 4*1TB drives with 4*3TB drives (home server). Any issues with TER or alike? I have 6 5k3000s with no problems whatsoever. Will ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
On Tue, Mar 6, 2012 at 2:40 AM, Koopmann, Jan-Peter jan-pe...@koopmann.eu wrote: Do you or anyone else have experience with the 3TB 5K3000 drives (namely HDS5C3030ALA630)? I am thinking of replacing my current 4*1TB drives with 4*3TB drives (home server). Any issues with TER or alike? I have been using 8 x 3TB 5k3000 in a raidz2 for about a year without issue. The Deskstar 3TB come off the same production line as the Ultrastar 5k3000. I would avoid the 2TB and smaler 5k3000 - They come off a separate production line. -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] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
-Original Message- From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Brandon High Sent: Tuesday, March 06, 2012 1:28 PM To: Koopmann, Jan-Peter Cc: zfs-discuss@opensolaris.org; luis Johnstone Subject: Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS On Tue, Mar 6, 2012 at 2:40 AM, Koopmann, Jan-Peter jan- pe...@koopmann.eu wrote: Do you or anyone else have experience with the 3TB 5K3000 drives (namely HDS5C3030ALA630)? I am thinking of replacing my current 4*1TB drives with 4*3TB drives (home server). Any issues with TER or alike? I have been using 8 x 3TB 5k3000 in a raidz2 for about a year without issue. The Deskstar 3TB come off the same production line as the Ultrastar 5k3000. I would avoid the 2TB and smaler 5k3000 - They come off a separate production line. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss We have been using around 24 of these on our backup targets for approximately 9 months without issue. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
- Original Message - From: Jordan McQuown j...@larsondesigngroup.com To: Jan-Peter Koopmann jan-pe...@koopmann.eu Cc: zfs-discuss@opensolaris.org Sent: Tuesday, March 6, 2012 1:36:54 PM Subject: Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS -Original Message- From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Brandon High Sent: Tuesday, March 06, 2012 1:28 PM To: Koopmann, Jan-Peter Cc: zfs-discuss@opensolaris.org; luis Johnstone Subject: Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS On Tue, Mar 6, 2012 at 2:40 AM, Koopmann, Jan-Peter jan- pe...@koopmann.eu wrote: Do you or anyone else have experience with the 3TB 5K3000 drives (namely HDS5C3030ALA630)? I am thinking of replacing my current 4*1TB drives with 4*3TB drives (home server). Any issues with TER or alike? I have been using 8 x 3TB 5k3000 in a raidz2 for about a year without issue. The Deskstar 3TB come off the same production line as the Ultrastar 5k3000. I would avoid the 2TB and smaler 5k3000 - They come off a separate production line. Though I must say, in their defense, we've got a bunch of these (5K3000s) in one of our machines, constituting a ZFS array - and they've been perfectly reliable. Only paid about $70 for 'em at the time, too. Lou Picciano -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss We have been using around 24 of these on our backup targets for approximately 9 months without issue. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
Greetings, Quick question: I am about to acquire some disks for use with ZFS (currently using zfs-fuse v0.7.0). I'm aware of some 4k alignment issues with Western Digital advanced format disks. As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) Can someone confirm this or point out any other known issues with the disks? I will be using the disks raw, unpartitioned. Many thanks, Luis. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
Deskstar 7K3000 (HDS723030ALA640) We are using these disks. They work fine with ZFS. Regards -- Volker -- Volker A. Brandt Consulting and Support for Oracle Solaris Brandt Brandt Computer GmbH WWW: http://www.bb-c.de/ Am Wiesenpfad 6, 53340 Meckenheim, GERMANYEmail: v...@bb-c.de Handelsregister: Amtsgericht Bonn, HRB 10513 Schuhgröße: 46 Geschäftsführer: Rainer J.H. Brandt und Volker A. Brandt When logic and proportion have fallen sloppy dead ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Compatibility of Hitachi Deskstar 7K3000 HDS723030ALA640 with ZFS
On Mon, Mar 5, 2012 at 9:52 AM, luis Johnstone l...@luisjohnstone.com wrote: As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn't lie about the physical layout of sectors on-platter) Both the 7K3000 and 5K3000 drives have 512B physical sectors. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
