Re: [zfs-discuss] Drive i/o anomaly

2011-02-09 Thread Matt Connolly
Thanks Richard - interesting... The c8 controller is the motherboard SATA controller on an Intel D510 motherboard. I've read over the man page for iostat again, and I don't see anything in there that makes a distinction between the controller and the device. If it is the controller, would it

[zfs-discuss] Drive i/o anomaly

2011-02-07 Thread Matt Connolly
Hi, I have a low-power server with three drives in it, like so: matt@vault:~$ zpool status pool: rpool state: ONLINE scan: resilvered 588M in 0h3m with 0 errors on Fri Jan 7 07:38:06 2011 config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0

Re: [zfs-discuss] Drive i/o anomaly

2011-02-07 Thread Matt Connolly
Thanks, Marion. (I actually got the drive labels mixed up in the original post... I edited it on the forum page: http://opensolaris.org/jive/thread.jspa?messageID=511057#511057 ) My suspicion was the same: the drive doing the slow i/o is the problem. I managed to confirm that by taking the

Re: [zfs-discuss] Migrating zpool to new drives with 4K Sectors

2011-02-07 Thread Matt Connolly
Except for meta data which seems to be written in small pieces, wouldn't having a zfs record size being a multiple of 4k on a vdev that is 4k aligned work ok? Or can the start of a zfs record that's 16kb for example start at any sector in the vdev? -- This message posted from opensolaris.org

Re: [zfs-discuss] iScsi slow

2010-08-04 Thread Matt Connolly
On 04/08/2010, at 2:13, Roch Bourbonnais roch.bourbonn...@sun.com wrote: Le 27 mai 2010 à 07:03, Brent Jones a écrit : On Wed, May 26, 2010 at 5:08 AM, Matt Connolly matt.connolly...@gmail.com wrote: I've set up an iScsi volume on OpenSolaris (snv_134) with these commands: sh-4.0# zfs

[zfs-discuss] Zpool mirror fail testing - odd resilver behaviour after reconnect

2010-06-30 Thread Matt Connolly
I have a Opensolaris snv_134 machine with 2 x 1.5TB drives. One is a Samsung Silencer the other is a dreaded Western Digital Green. I'm testing the mirror for failure by simply yanking out the SATA cable while the machine is running. The system never skips a beat, which is great. But the

[zfs-discuss] mirror writes 10x slower than individual writes

2010-05-31 Thread Matt Connolly
I have an odd setup at present, because I'm testing while still building my machine. It's an Intel Atom D510 mobo running snv_134 2GB RAM with 2 SATA drives (AHCI): 1: Samsung 250GB old laptop drive 2: WD Green 1.5TB drive (idle3 turned off) Ultimately, it will be a time machine backup for my

[zfs-discuss] Zfs mirror boot hang at boot

2010-05-29 Thread Matt Connolly
Hi, I'm running snv_134 on 64-bit x86 motherboard, with 2 SATA drives. The zpool rpool uses whole disk of each drive. I've installed grub on both discs, and mirroring seems to be working great. I just started testing what happens when a drive fails. I kicked off some activities and unplugged

[zfs-discuss] iScsi slow

2010-05-26 Thread Matt Connolly
I've set up an iScsi volume on OpenSolaris (snv_134) with these commands: sh-4.0# zfs create rpool/iscsi sh-4.0# zfs set shareiscsi=on rpool/iscsi sh-4.0# zfs create -s -V 10g rpool/iscsi/test The underlying zpool is a mirror of two SATA drives. I'm connecting from a Mac client with global SAN