[zfs-discuss] new labelfix needed

2010-08-31 Thread Benjamin Brumaire
Hi, labelfix http://www.opensolaris.org/jive/thread.jspa?messageID=229969 saved already a lot of data as it makes dettached devices importable. A quick test today shows labelfix won't work anymore: #uname -a SunOs bigmama 5.11 snv_127 i86pc 386 i86pc Solaris #./labelfix /dev/rdsk/c0d1s4

Re: [zfs-discuss] new labelfix needed

2010-08-31 Thread Mark J Musante
On Mon, 30 Aug 2010, Benjamin Brumaire wrote: As this feature didn't make it into zfs it would be nice to have it again. Better to spend time fixing the problem that requires a 'labelfix' as a workaround, surely. What's causing the need to fix vdev labels?

Re: [zfs-discuss] 4k block alignment question (X-25E)

2010-08-31 Thread Ray Van Dolson
On Mon, Aug 30, 2010 at 10:11:32PM -0700, Christopher George wrote: I was wondering if anyone had a benchmarking showing this alignment mattered on the latest SSDs. My guess is no, but I have no data. I don't believe there can be any doubt whether a Flash based SSD (tier1 or not) is

Re: [zfs-discuss] Intermittent ZFS hang

2010-08-31 Thread David Blasingame Oracle
Charles, Just like UNIX, there are several ways to drill down on the problem. I would probably start with a live crash dump (savecore -L) when you see the problem. Another method would be to grap multiple stats commands during the problem to see where you can drill down later. I would

Re: [zfs-discuss] 4k block alignment question (X-25E)

2010-08-31 Thread Bob Friesenhahn
On Mon, 30 Aug 2010, Christopher George wrote: It should be noted, the above highlight only applies to Flash based SSD as an NVRAM based SSD does *not* suffer the same fate, as its performance is not bound by or vary with partition (mis)alignment. What is a NVRAM based SSD? It seems to me

Re: [zfs-discuss] 4k block alignment question (X-25E)

2010-08-31 Thread Christopher George
What is a NVRAM based SSD? It is simply an SSD (Solid State Drive) which does not use Flash, but does use power protected (non-volatile) DRAM, as the primary storage media. http://en.wikipedia.org/wiki/Solid-state_drive I consider the DDRdrive X1 to be a NVRAM based SSD even though we

Re: [zfs-discuss] 4k block alignment question (X-25E)

2010-08-31 Thread Brandon High
On Mon, Aug 30, 2010 at 3:05 PM, Ray Van Dolson rvandol...@esri.com wrote: I want to fix (as much as is possible) a misalignment issue with an X-25E that I am using for both OS and as an slog device. It's pretty easy to get the alignment right fdisk uses a default of 63/255/*, which isn't easy

Re: [zfs-discuss] Terrible ZFS performance on a Dell 1850 w/ PERC 4e/Si (Sol10U6)

2010-08-31 Thread Robert Loper
I ran into this issue on my Dell 1850s also. You'll need to go into BIOS, change the PERC controller mode from RAID to SCSI and reboot. Then when the system comes back up it will give a warning about switching RAID controller modes and data loss (Have Backups)!. Then if you boot from

Re: [zfs-discuss] 4k block alignment question (X-25E)

2010-08-31 Thread Haudy Kazemi
Christopher George wrote: What is a NVRAM based SSD? It is simply an SSD (Solid State Drive) which does not use Flash, but does use power protected (non-volatile) DRAM, as the primary storage media. http://en.wikipedia.org/wiki/Solid-state_drive I consider the DDRdrive X1 to be a