I see this problem if you have the array configured for RAID 5 and you
have not pushed the F8 key during array config after setting up
the array. Try rebooting, setting the Raid 5 for INIT (Press F8) and it
goes away, but the whole array will reinit itself. There seems to be
some sort of problem in their RAID 5 logic and you can setup a RAID 5
stripe set, but init doesn't finish or gets in a wierd state during
reboot. It seems confined to 9500 series controllers, but I have also
seen this behavior on the 8000 series drivers as well. I don't know
if you are using RAID 5 , but I have seen this problem on RAID 5 configs
only.
Jeff
Alex Bligh - linux-kernel wrote:
--On 01 November 2005 18:13 +0100 Florian Weimer <[email protected]>
wrote:
In my experience, the 3ware SATA controllers which are not NCQ-capable
have very, very lousy write performance with some drives, unless you
enable the write cache (which is, of course, a bit dangerous without
UPS or battery backup on the controller).
Not to sound like the a 3ware chearleader, but this card does support
NCQ.
Oh. I didn't know whether this particukar controller supported NCQ or
not.
It even supports SATA-3, not much good that it does me.
I managed to format it reiserfs in the end. dbench (yes I know it isn't a
great benchmark) gives me a write speed of 7Mb/s compared to 700Mb/s
if one
of the disks in the array is attached to the motherboard SATA controller.
7Mb/s is quite stunningly appalling. I realise the release notes warn of
slow writes, but that's just daft! I have a few bits in my setup to check
before I start pointing the finger comprehensively. It may (for instance)
be a large partition problem (suggested on the ext2 list).
I'm taking it that it works at least for some people (did you test write
speed Lawrence?).
--
Alex Bligh
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