similar to: Hardware RAID vs. ZFS RAID

Hello all, I am a complete newbie to OpenSolaris, and must to setup a ZFS NAS. I do have linux experience, but have never used ZFS. I have tried to install OpenSolaris Developer 134 on a 11TB HW RAID-5 virtual disk, but after the installation I can only use one 2TB disk, and I cannot partition the rest. I realize that maximum partition size is 2TB, but I guess the rest must be usable. For

I have some questions about the choice of SSDs to use for ZIL and L2ARC. I''m trying to build an OpenSolaris iSCSI SAN out of a whitebox system, which is intended to be used as a backup SAN during storage migration, so it''s built on a tight budget. The system currently has 4GB RAM, 3GHz Core2-Quad and 8x 500GB WD REII SATA HDDs attached to an Areca 8port ARC-1220 controller

Running a zpool scrub on our production pool is showing a scrub rate of about 400K/s. (When this pool was first set up we saw rates in the MB/s range during a scrub). Both zpool iostat and an iostat -Xn show lots of idle disk times, no above average service times, no abnormally high busy percentages. Load on the box is .59. 8 x 3GHz, 32GB ram, 96 spindles arranged into raidz zdevs on OI 147.

Folks, We are in the process of purchasing new san/s that our mail server runs on (JES3). We have moved our mailstores to zfs and continue to have checksum errors -- they are corrected but this improves on the ufs inode errors that require system shutdown and fsck. So, I am recommending that we buy small jbods, do raidz2 and let zfs handle the raiding of these boxes. As we need more

Hi all :) I''ve been wanting to make the switch from XFS over RAID5 to ZFS/RAIDZ2 for some time now, ever since I read about ZFS the first time. Absolutely amazing beast! I''ve built my own little hobby server at home and have a boatload of disks in different sizes that I''ve been using together to build a RAID5 array on Linux using mdadm in two layers; first layer is

Hi I wanted to get some expert advice on this. I have an ordinary hardware SAN from Promise Tech that presents the LUNs via iSCSI. I would like to use that if possible with my VMware environment where I run several Solaris / OpenSolaris virtual machines. My question is regarding the virtual disks. 1. Should I create individual iSCSI LUNs and present those to the VMware ESXi host as iSCSI storage,

Hi folks, Myself and a colleague are currently involved in a prototyping exercise to evaluate ZFS against our current filesystem. We are looking at the best way to arrange the disks in a 3510 storage array. We have been testing with the 12 disks on the 3510 exported as "nraid" logical devices. We then configured a single ZFS pool on top of this, using two raid-z arrays. We are getting

hail, I write just to make sure its dead. I've lost the first disk on a ZFS pool (jbod). Now I can't mount it with only the second disk. The first disk clicks to death :( [root@optimus ~]# zpool status pool: pool state: UNAVAIL status: One or more devices could not be opened. There are insufficient replicas for the pool to continue functioning. action: Attach the missing

Anyone know of a SATA and/or SAS HBA with battery backed write cache? Seems like using a full-blown RAID controller and exporting each individual drive back to ZFS as a single LUN is a waste of power and $$$. Looking for any thoughts or ideas. Thanks. -Matt -- This message posted from opensolaris.org

Hi. I''m managing a HDS storage system which is slightly larger than 100 TB and we have used approx. 3/4. We use vxfs. The storage system is attached to a solaris 9 on sparc via a fiberswitch. The storage is shared via nfs to our webservers. If I was to replace vxfs with zfs I could utilize raidz(2) instead of the built-in hardware raid-controller. Are there any jbod-only storage

Dear all, we''re currently looking forward to restructure our hardware environment for our datawarehousing product/suite/solution/whatever. We''re currently running the database side on various SF V440''s attached via dual FC to our SAN backend (EMC DMX3) with UFS. The storage system is (obviously in a SAN) shared between many systems. Performance is mediocre in terms

We are a CentOS shop, and have the lucky, fortunate problem of having ever-increasing amounts of data to manage. EXT3/4 becomes tough to manage when you start climbing, especially when you have to upgrade, so we're contemplating switching to ZFS. As of last spring, it appears that ZFS On Linux http://zfsonlinux.org/ calls itself production ready despite a version number of 0.6.2, and

As mentioned last night, we''ve been reviewing a proposal for hot spare support in ZFS. Below you can find a current draft of the proposed interfaces. This has not yet been submitted for ARC review, but comments are welcome. Note that this does not include any enhanced FMA diagnosis to determine when a device is "faulted". This will come in a follow-on project, of which some

In my testing, I''ve found the following error: zpool status -v pool: local state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: http://www.sun.com/msg/ZFS-8000-8A scrub: none requested

I''m trying to get maybe 200 MB/sec over NFS for large movie files (need large capacity to hold all of them). Are there any rules of thumb on how much RAM is needed to handle this (probably RAIDZ for all the disks) with zfs, and how large a server should be used? The throughput required is not so large, so I am thinking an X4100 M2 or X4150 should be plenty. This message posted from

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

What does it mean for a vdev to have an invalid configuration and how can it be fixed or reset? As you can see, the following pool can no longer be imported: (Note that the "last accessed by another system" warning is because I moved these drives to my test workstation.) ~$ zpool import -f pool0 cannot import ''pool0'': invalid vdev configuration ~$ zpool import pool:

Hi, for zfs raidz1, I know for random io, iops of a raidz1 vdev eqaul to one physical disk iops, since raidz1 is like raid5 , so is raid5 has same performance like raidz1? ie. random iops equal to one physical disk''s ipos. Regards Victor -- This message posted from opensolaris.org

A customer is looking to replace or augment their Sun Thumper with a ZFS appliance like 7320. However, the Thumper was used not only as a protocol storage server (home dirs, files, backups over NFS/CIFS/Rsync), but also as a general-purpose server with unpredictably-big-data programs running directly on it (such as corporate databases, Alfresco for intellectual document storage, etc.) in order to

Hi all, We have a server with a LSI 9240-4i controller configured in JBOD with 4 SATA disks. Running FreeBSD 9.1-Beta1: Relevant dmesg: FreeBSD 9.1-BETA1 #0: Thu Jul 12 09:38:51 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 CPU: Intel(R) Xeon(R) CPU E31230 @ 3.20GHz (3200.09-MHz K8-class CPU) Origin = "GenuineIntel" Id = 0x206a7 Family = 6 Model =