search for: raidz2

Hi guys, I am about to reshape my data spool and am wondering what performance diff. I can expect from the new config. Vs. The old. The old config. Is a pool of a single vdev of 8 disks raidz2. The new pool config is 2vdev''s of 7 disk raidz2 in a single pool. I understand it should be better with higher io throughput....and better read/write rates...but interested to hear the science behind it. I have googles and read the ifs best practice guide and evil tuning, but neither co...

...please tell me why it''s wrong? (I feel like it has to be). A RaidZ-2 pool with one missing disk offers the same failure resilience as a healthy RaidZ1 pool (no data loss when one disk fails). I had initially wanted to do single parity raidz pool (5disk), but after a recent scare decided raidz2 was the way to go. With the help of a sparse file (''mkfile -n 2000G'') offlined after pool creation, I was able to start using my pool before my 6th disk arrived. Once it''s here, I''ll swap it in for the sparse file and let it resilver. Can someone with a strong...

Hello, 1) If i create a raidz2 pool on some disks, start to use it, then the disks'' controllers change. What will happen to my zpool? Will it be lost or is there some disk tagging which allows zfs to recognise the disks? 2) if i create a raidz2 on 3 HDs, do i have any resilience? If any one of those drives fails, do...

Hi all I have installed a new server with 77 2TB drives in 11 7-drive RAIDz2 VDEVs, all on WD Black drives. Now, it seems two of these drives were bad, one of them had a bunch of errors, the other was very slow. After zfs offlining these and then zfs replacing them with online spares, resilver ended and I thought it''d be ok. Appearently not. Albeit the resilver suc...

...g another raidz1 and then somehow growing the "tank" zpool? Does this make sense, or is this stupid from a performance perspective? Should I just have two separate zpools? Ideally I would like to have one massive data storage target. I''d be fine with somehow changing this into a raidz2 as well, I suppose, since I had planned on it being another raidz1 anyway. Or, perhaps I could add tank #2 as a raidz2, and then move all the data off tank #1, and then add disks individually from tank #1 until I have all 14 disks in a single raidz2? Performance is not an absolute must - I can dea...

I''d like to replace/upgrade two 500GB disks in RaidZ2 vdev with 1TB disks, but I have some preliminary questions/concerns before trying ''zfs replace dpool ?'' Will ZFS permit this replacement? Will ZFS use the extra space in a heterogeneous RaidZ2 vdev, or is the size limited by the smallest disk in the vdev? Thanks in advance, Viz...

Already making use of it, thank you! http://www.justinconover.com/blog/?p=17 I took 6x250gb disk and tried raidz2/raidz/none # zpool create zfs raidz2 c0d0 c1d0 c2d0 c3d0 c7d0 c8d0 df -h zfs Filesystem size used avail capacity Mounted on zfs 915G 49K 915G 1% /zfs # zpool destroy -f zfs Plain old raidz (raid-5ish) # zpool create zfs raidz c0d0 c1d0 c2d0 c3d0 c7...

I''m playing around with ZFS and want to figure out the best use of my 6x 300GB SATA drives. The purpose of the drives is to store all of my data at home (video, photos, music, etc). I''m debating between: 6x 300GB disks in a single raidz2 pool --or-- 2x (3x 300GB disks in a pool) mirrored I''ve read up a lot on ZFS, but I can''t really figure out which is ideal. I know that both ways will work but it seems like the 3 disk strip in a 2 way mirror is the most flexible as far as adding drives. Any help is appreciate...

Hello all, I''m building a file server (or just a storage that I intend to access by Workgroup from primarily Windows machines) using zfs raidz2 and openindiana 148. I will be using this to stream blu-ray movies and other media, so I will be happy if I get just 20MB/s reads, which seems like a pretty low standard considering some people are getting 100+. This is my first time with OI, and raid, for that matter, so I hope you guys have a lit...

...pansion. Not adding more RAIDZ stripes to a pool, but adding more drives to the stripe itself. I''m wondering if an RFE has been submitted for this and if any progress has been made, or is expected? I find myself out of space on my current RAID5 setup and would love to flip over to a ZFS raidz2 solution using 1TB drives, but the lack of efficient expansion with time is really killing the deal. --Bart

...will continue to function, possibly in a degraded state. action: Wait for the resilver to complete. scrub: resilver in progress for 147h19m, 100.00% done, 0h0m to go config: NAME STATE READ WRITE CKSUM filerbackup13 DEGRADED 0 0 0 raidz2 DEGRADED 0 0 0 c0t8d0 ONLINE 0 0 0 replacing DEGRADED 0 0 0 c0t9d0 OFFLINE 0 0 0 c0t23d0 ONLINE 0 0 0 454G resilvered c0t10d0 ONLINE 0 0...

Will it be possible to update an existing raidz to a raidz2? I wouldn''t think so, but maybe I''ll be pleasantly surprised. -frank

I''ve got a zpool that has 4 raidz2 vdevs each with 4 disks (750GB), plus 4 spares. At one point 2 disks failed (in different vdevs). The message in /var/adm/messages for the disks were ''device busy too long''. Then SMF printed this message: Nov 23 04:23:51 x.x.com EVENT-TIME: Fri Nov 23 04:23:51 EST 2007 Nov 23 04:...

I recently had a hard drive die on my 6 drive raidz2 array (4+2). Unfortunately, now that the dead drive didn''t register anymore, Linux decided to rearrange all of the drive names around such that zfs couldn''t figure out what drives went where. After much hair pulling, I gave up on Linux and went to OpenSolaris, but it wouldn'...

...I''m on the way to move a backup server to using zfs based storage, but i don''t want to spend too much drives to parity (the 16 drives are attached to a 3ware raid controller so i could also just use raid6 there). I want to be able to sustain two parallel drive failures so i need raidz2. The man page of zpool says the recommended vdev size is somewhere between 3-9 drives (for raidz). Is this just for getting the best performance or are there stability issues ? There won''t be anything like heavy multi-user IO on this machine so couldn''t i just put all 16 drive in...

...city. These are for large sequential access (large media files) used by no more than 3 or 5 users at a time. I''m inquiring as to what the best configuration for this is for vdevs. I''m considering the following configurations 4 x x6 vdevs in RaidZ1 configuration 3 x x8 vdevs in RaidZ2 configuration Obviously if a drive fails, it''ll take a good several days to resilver. The data is important but not critical. Using raidz1 allows you one drive failure, but my understanding is that if the zpool has four vdevs using raidz1, then any single vdev failure of more than one d...

I have a customer who has implemented the following layout: As you can see, he has mostly raidz zvols but has one raidz2 in the same zpool. What are the implications here? Is this a bad thing to do? Please elaborate. Thanks, Scott Gaspard Scott.J.Gaspard at Sun.COM > NAME STATE READ WRITE CKSUM > > chipool1 ONLINE 0 0 0 > > raidz2 ONLINE...

I have an X4500 thumper box with 48x 500gb drives setup in a a pool and split into raidz2 sets of 8 - 10 drives within the single pool. I had a failed disk with i cfgadm unconfigured and replaced no problem, but it wasn''t recognised as a Sun drive in Format and unbeknown to me someone else logged in remotely at the time and issued a zpool replace.... I corrected the system/dr...

I''m working to expand / develop on the zpool built-in type, but the zpool command is failing and Puppet''s returned stderr is not what I get if I copy/paste the command given by the debug output. # cat /etc/puppet/manifests/zpool_raidz2.pp zpool { ''tank'': ensure => present, raidz => [ ''d01 d02 d03 d04'', ''d05 d06 d07 d08'' ], raid_parity => ''raidz2'', pool => ''tank'', log_mirror => ''d09 d10'...

I am curious why zpool status reports a pool to be in the DEGRADED state after a drive in a raidz2 vdev has been successfully replaced. In this particular case drive c0t6d0 was failing so I ran, zpool offline home/c0t6d0 zpool replace home c0t6d0 c8t1d0 and after the resilvering finished the pool reports a degraded state. Hopefully this is incorrect. At this point is the vdev in question now h...