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 NV
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 DVD/Jumpsta
On Mon, Aug 30, 2010 at 3:05 PM, Ray Van Dolson 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 to change. This
> 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 de
Hi Charles,
You might want rule out hardware issues first...
You can review iostat -En or the /var/adm/messages file to see if any
driver related error messages are related to the hangs, like this:
c4t40d0 Soft Errors: 7 Hard Errors: 0 Transport Errors: 0
Vendor: SUN Product: Stor
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 t
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
pr
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)
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?
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