similar to: SAS vs SATA: Same size, same speed, why SAS?

Hi all I have a test system with snv134 and 8x2TB drives in RAIDz2 and currently no Zil or L2ARC. I noticed the I/O speed to NFS shares on the testpool drops to something hardly usable while scrubbing the pool. How can I address this? Will adding Zil or L2ARC help? Is it possible to tune down scrub''s priority somehow? Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 roy at

Hi All, I am looking at ZFS and I get that they call it RAIDZ which is similar to RAID 5, but what about RAID 10? Isn''t a RAID 10 setup better for data protection? So if I have 8 x 1.5tb drives, wouldn''t I: - mirror drive 1 and 5 - mirror drive 2 and 6 - mirror drive 3 and 7 - mirror drive 4 and 8 Then stripe 1,2,3,4 Then stripe 5,6,7,8 How does one do this with ZFS?

My current home fileserver (running Open Solaris 111b and ZFS) has an ASUS M2N-SLI DELUXE motherboard. This has 6 SATA connections, which are currently all in use (mirrored pair of 80GB for system zfs pool, two mirrors of 400GB both in my data pool). I''ve got two more hot-swap drive bays. And I''m getting up towards 90% full on the data pool. So, it''s time to expand,

Hi I''m running OpenSolaris 148 on a few boxes, and newer boxes are getting installed as we speak. What would you suggest for a good SLOG device? It seems some new PCI-E-based ones are hitting the market, but will those require special drivers? Cost is obviously alsoo an issue here.... Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 roy at karlsbakk.net

I?ve spend a few hours reading through the forums and wiki and honestly my head is spinning. I have been trying to study up on either buying or building a box that would allow me to add drives of varying sizes/speeds/brands (adding more later etc) and still be able to use the full space of drives (minus parity? [not sure if I got the terminology right]) with redundancy. I have found the ?all in

I currently am getting good speeds out of my existing system (8x 2TB in a RAIDZ2 exported over fibre channel) but there''s no such thing as too much speed, and these other two drive bays are just begging for drives in them.... If I go to 10x 2TB in a RAIDZ3, will the extra spindles increase speed, or will the extra parity writes reduce speed, or will the two factors offset and leave things

I was recently evaluating much the same question but with out only a single pool and sizing my disks equally. I only need about 500GB of usable space and so I was considering the value of 4x 250GB SATA Drives versus 5x 160GB SATA drives. I had intended to use an AMS 5 disk in 3 5.25" bay hot-swap backplane. http://www.american-media.com/product/backplane/sata300/sata300.html I priced

My setup: A SuperMicro 24-drive chassis with Intel dual-processor motherboard, three LSI SAS3081E controllers, and 24 SATA 2TB hard drives, divided into three pools with each pool a single eight-disk RAID-Z2. (Boot is an SSD connected to motherboard SATA.) This morning I got a cheerful email from my monitoring script: "Zchecker has discovered a problem on bigdawg." The full output is

Hello All, I build a new Storage Server to backup my data, keep archives of client files, etc I recently had a near loss of important items. So I built a 16 SATA bay enclosure (16 hot swappable + 3 internal) enclosure, 2 x 3Ware 8 port RAID cards, 8gb RAM, dual AMD Opertron. I have a 1tb boot drive and I put in 8 x 1.5tb Seagate 7200 drives. In the future I want to fill the other 8 SATA bays

Hi, i''m new to the list so please bare with me. This isn''t an OpenSolaris related problem but i hope it''s still the right list to post to. 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

An interesting thing I just noticed here testing out some Firewire drives with OpenSolaris. Setup : OpenSolaris 2009.06 and a dev version (snv_129) 2 500Gb Firewire 400 drives with integrated hubs for daisy-chaining (net: 4 devices on the chain) - one SATA bridge - one PATA bridge Created a zpool with both drives as simple vdevs Started a zfs send/recv to backup a local filesystem Watching

I have been searching this forum and just about every ZFS document i can find trying to find the answer to my questions. But i believe the answer i am looking for is not going to be documented and is probably best learned from experience. This is my first time playing around with open solaris and ZFS. I am in the midst of replacing my home based filed server. This server hosts all of my media

I currently have a 7x1.5tb raidz1. I want to add "phase 2" which is another 7x1.5tb raidz1 Can I add the second phase to the first phase and basically have two raid5''s striped (in raid terms?) Yes, I probably should upgrade the zpool format too. Currently running snv_104. Also should upgrade to 110. If that is possible, would anyone happen to have the simple command lines to

Hi, I have a small question about the depth of scrub in a raidz/2/3 configuration. I''m quite sure scrub does not check spares or unused areas of the disks (it could check if the disks detects any errors there). But what about the parity? Obviously it has to be checked, but I can''t find any indications for it in the literature. The man page only states that the data is being

Hi. I installed solaris express developer edition (b79) on a supermicro quad-core harpertown E5405 with 8 GB ram and two internal sata-drives. I installed solaris onto one of the internal drives. I added an areca arc-1680 sas-controller and configured it in jbod-mode. I attached an external sas-cabinet with 16 sas-drives 1 TB (931 binary GB). I created a raidz2-pool with ten disks and one spare.

I''ve lucked into some big disks, so I''m thinking of biting the bullet (screaming loudly in the process) and superceding the SATA controllers on my motherboard with something that will work with hot-swap in Solaris. (did I mention before I''m still pissed about this?) I have enough to populate all 8 bays (meaning adding 4 disks to what I have now), so the 6 ports on the

Kind of a newbie question here -- or I haven''t been able to find great search terms for this... Does ZFS recognize zpool members based on drive serial number or some other unique, drive-associated ID? Or is it based off the drive''s location (c0t0d0, etc). I''m wondering because I have a zpool set up across a bunch of drives and I am planning to move those drives to

All, So I have started working with Solaris 10 at work a bit (I''m a Linux guy by trade) and I have a dying nfs box at home. So the long and short of it is as follows: I would like to setup a SATAII whitebox that uses ZFS as its filesystem. The box will probably be very lightly used, streaming media to my laptop and workstation would be the bulk of the work. However I do have quite a

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.

Hi all I have this server with some 50TB disk space. It originally had 30TB on WD Greens, was filled quite full, and another storage chassis was added. Now, space problem gone, fine, but what about speed? Three of the VDEVs are quite full, as indicated below. VDEV #3 (the one with the spare active) just spent some 72 hours resilvering a 2TB drive. Now, those green drives suck quite hard, but not