Date: Thu, 8 Jun 2000 17:20:01 -0700 (PDT) From: "Aleksandr A. Babaylov" <babolo@zx.ru> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/19129: AMI Raid Express 200 card extremely slow ( < 6MB/s) Message-ID: <200006090020.RAA41861@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR misc/19129; it has been noted by GNATS. From: "Aleksandr A. Babaylov" <babolo@zx.ru> To: cwilkes@singingfish.com Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: misc/19129: AMI Raid Express 200 card extremely slow ( < 6MB/s) Date: Fri, 9 Jun 2000 04:17:59 +0400 (MSD) cwilkes@singingfish.com writes: > > >Number: 19129 > >Category: misc > >Synopsis: AMI Raid Express 200 card extremely slow ( < 6MB/s) > >Confidential: no > >Severity: non-critical > >Priority: medium > >Responsible: freebsd-bugs > >State: open > >Quarter: > >Keywords: > >Date-Required: > >Class: sw-bug > >Submitter-Id: current-users > >Arrival-Date: Thu Jun 08 11:30:00 PDT 2000 > >Closed-Date: > >Last-Modified: > >Originator: Chris Wilkes > >Release: 4.0 > >Organization: > >Environment: > FreeBSD octopus 4.0-STABLE FreeBSD 4.0-STABLE #0: Sun May 28 11:04:59 GMT 2000 > >Description: > File server with an AMI MegaRaid Express 200 card attached to a disk enclosure > with 8 9G LVD SCSI2 drives, for a total of ~60G of RAID5 storage. > Disk writes are extremely slow on it, around 6MB/s. Called AMI and they > suggested moving from Linux to FreeBSD. Did that and I still see the same > (bad) performance. I see that if LVD controller works with non-LVD disks I dont know AMI MegaRaid Express 200 card - are you shure it has LVD interface? > Speed (MB/s) Description > 17.1 internal SCSI -> other internal SCSI > 16.5 raid -> internal scsi > 6.05 internal scsi -> raid > 4.10 raid -> raid > > The drives are rated at 20MB/s, I'm really happy with the 17.1MB/s I'm seeing > for local to local. I was expecting a huge gain up to about the 80MB/s max > spec for scsi-2, but instead writes are 1/3 the speed. > >How-To-Repeat: > Reformated drives after the system became unstable and core dumped on an > fsck. Still the same performance numbers. > >Fix: > > > >Release-Note: > >Audit-Trail: > >Unformatted: > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-bugs" in the body of the message > -- ZZZZ X X Z X X ZX Spectrum software museum Z X http://www.zx.ru/ ftp://zx-museum.org.ru/ Z X X babolo@zx.ru Alexandr Babaylov ZZZZ X X To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200006090020.RAA41861>