Date: Thu, 11 Nov 1999 01:36:52 -0600 (CST) From: mdragon@vera.net To: freebsd-scsi@FreeBSD.ORG Subject: SYM 0.9.0-19991024 O.K. Message-ID: <Pine.BSF.4.20.9911110041310.17928-100000@mail.vera.net>
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Last night we tested this controller on a HP-Netserver LH4 (53c895 fast40 scsi) this machine has 2 Xeons and 4 9Gb-10,000 rpm. disks and we found no problems and a performace(*) gain of roughly 3-4% over the standard ncr0 controller. 3 disks are configured as a ccd device with a 8192 interleave, Kernel 3.3-stable. [(*) not even a real benchmark: just running du, dd, find . -exec grep, and tar cf - | tar xf - ] A fact that troubles me is that sym0 was able to set the transfer speed to 80.000 MB/s. and the only change in the kernel configuration file was adding the sym0 line, I can't figure out why ncr0 always sets transfer speed to 40 MB/s. I remember that a similar kernel was built on a HP LPr (same 53c895 controller, same disks) and ncr0 also set the transfers speeds to fast40-wide. What am I doing wrong? My list of questions: - Is vinum prefered over ccd ? - Is someone working on the AMI MegaRAID controller ? - Is it possible to use this raid somehow ? (maybe through bios, at least the bootloader can recognize it) Would sym0 find the raid ? I have the idea that it should, since it appears in the SCSI bus as id #0 lun #1 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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