Messages in this thread | | | Date | Tue, 01 Nov 2005 15:54:30 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: 3ware 9550SX problems - mke2fs incredibly slow writing last third of inode tables |
| |
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 <fw@deneb.enyo.de> > 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 > - > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |