similar to: ashift and vdevs

Hi, Does anyone use Seagate ST32000542AS disks with ZFS? I wonder if the performance is not that ugly as with WD Green WD20EARS disks. Thanks, -- Piotr Jasiukajtis | estibi | SCA OS0072 http://estseg.blogspot.com

I sent a zvol from host a, to host b, twice. Host b has two pools, one ashift=9, one ashift=12. I sent the zvol to each of the pools on b. The original source pool is ashift=9, and an old revision (2009_06 because it''s still running xen). I sent it twice, because something strange happened on the first send, to the ashift=12 pool. "zfs list -o space" showed figures at

The time has come to expand my OpenSolaris NAS. Right now I have 6 1TB Samsung Spinpoints in a Raidz2 configuration. I also have a mirrored root pool. The Raidz2 configuration should be for my most critical data - but right now it is holding everything so I need to add some more pools and move some data around. To start I need a vdev I will call "temp" that acts as a networked bit

Hi. Is the problem with ZFS supporting 4k sectors or is the problem mixing 512 byte and 4k sector disks in one pool, or something else? I have seen alot of discussion on the 4k issue but I haven''t understood what the actual problem ZFS has with 4k sectors is. It''s getting harder and harder to find large disks with 512 byte sectors so what should we do? TIA...

Well this is a new one.... Illumos/Openindiana let me add a device as a hot spare that evidently has a different sector alignment than all of the other drives in the array. So now I''m at the point that I /need/ a hot spare and it doesn''t look like I have it. And, worse, the other spares I have are all the same model as said hot spare. Is there anything I can do with this or

Hi, my oi151 based home NAS is approaching a frightening "drive space" level. Right now the data volume is a 4*1TB Raid-Z1, 3 1/2" local disks individually connected to an 8 port LSI 6Gbit controller. So I can either exchange the disks one by one with autoexpand, use 2-4 TB disks and be happy. This was my original approach. However I am totally unclear about the 512b vs 4Kb issue.

Banging my head against a Seagate 3TB USB3 drive. Its marketing name is: Seagate Expansion 3 TB USB 3.0 Desktop External Hard Drive STAY3000102 format(1M) shows it identify itself as: Seagate-External-SG11-2.73TB Under both Solaris 10 and Solaris 11x, I receive the evil message: | I/O request is not aligned with 4096 disk sector size. | It is handled through Read Modify Write but the performance

Hello, Daniel, Apparently your data is represented by rather small files (thus many small data blocks), so proportion of metadata is relatively high, and your<4k blocks are now using at least 4k disk space. For data with small blocks (a 4k volume on an ashift=12 pool) I saw metadata use up most of my drive - becoming equal to data size. Just for the sake of completeness, I brought up a

Hi ZFS Discuss, I have a 8x 1TB RAIDZ running on Samsung 1TB 5400rpm drives with 512b sectors. I will be replacing all of these with 8x Western Digital 2TB drives with support for 4K sectors. The replacement plan will be to swap out each of the 8 drives until all are replaced and the new size (~16TB) is available with a `zfs scrub`. My question is, how do I do this and also factor in the new

So, what is the story about 4KB disk sectors? Should such disks be avoided with ZFS? Or, no problem? Or, need to modify some config file before usage? -- This message posted from opensolaris.org

.. evidently doesn''t work. GRUB reboots the machine moments after loading stage2, and doesn''t recognise the fstype when examining the disk loaded from an alernate source. This is with SX-151. Here''s hoping a future version (with grub2?) resolves this, as well as lets us boot from raidz. Just a note for the archives in case it helps someone else get back the afternoon

Hello all, I found this dialog on the zfs-devel at zfsonlinux.org list, and I''d like someone to confirm-or-reject the discussed statement. Paraphrasing in my words and understanding: "Labels, including Uberblock rings, are fixed 256KB in size each, of which 128KB is the UB ring. Normally there is 1KB of data in one UB, which gives 128 TXGs to rollback to. When ashift=12 is

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Hi, I''m running FreeBSD 7.1-PRERELEASE with a 500-gig ZFS drive. Recently I''ve encountered a FreeBSD problem (PR kern/128083) and decided about updating the motherboard BIOS. It looked like the update went right but after that I was shocked to see my ZFS destroyed! Rolling the BIOS back did not help. Now it looks like that: # zpool status pool: tank state: UNAVAIL status:

Has anyone tried to use these yet? For hysterical raisons, my primary machine is CentOS5 32bit (up to date). In the machine I have a SiI 3132 dual port SATA controller with port multiplier. Both ports are plugged into an external storage device which presents 4 SATA disks on each port, for a total of 8 possible disks. Currently I have 5*1Tb in there, configured as RAID5 via mdadm I boot off

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

I noted this PSARC thread with interest: Re: zpool autoexpand property [PSARC/2008/353 Self Review] because it so happens that during a recent disk upgrade, on a laptop. I''ve migrated a zpool off of one partition onto a slightly larger one, and I''d like to somehow tell zfs to grow the zpool to fill the new partition. So, what''s the best way to do this? (and is it

If I want to use a batch of new Seagate 3TB Barracudas with Solaris 11, will zpool let me create a new pool with ashift=12 out of the box or will I need to play around with a patched zpool binary (or the iSCSI loopback)? -- Dave Pooser Manager of Information Services Alford Media http://www.alfordmedia.com

ZFS Fans, Here''s a list of features that we are proposing for Solaris 10u5. Keep in mind that this is subject to change. Features: PSARC 2007/142 zfs rename -r PSARC 2007/171 ZFS Separate Intent Log PSARC 2007/197 ZFS hotplug PSARC 2007/199 zfs {create,clone,rename} -p PSARC 2007/283 FMA for ZFS Phase 2 PSARC/2006/465 ZFS Delegated Administration PSARC/2006/577 zpool property to

The latest ZFS patches for Solaris 10 are now available: 120011-14 - SunOS 5.10: kernel patch 120012-14 - SunOS 5.10_x86: kernel patch ZFS Pool Version available with patches = 4 These patches will provide access to all of the latest features and bug fixes: Features: PSARC 2006/288 zpool history PSARC 2006/308 zfs list sort option PSARC 2006/479 zfs receive -F PSARC 2006/486 ZFS canmount