Date: 27 Sep 1999 00:23:39 -0400 From: Kevin Street <street@iname.com> To: Gerard Roudier <groudier@club-internet.fr> Cc: scsi@FreeBSD.ORG Subject: Re: sym driver 0.3.0 Message-ID: <87puz5q8xg.fsf@mired.eh.local> In-Reply-To: Gerard Roudier's message of "Sat, 25 Sep 1999 22:45:15 %2B0200 (MET DST)" References: <Pine.LNX.3.95.990925220854.343A-100000@localhost>
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Gerard Roudier <groudier@club-internet.fr> writes: > I have made available revision 0.3.0 of the sym_hipd driver for > FreeBSD-CAM. This driver version behaves correctly on QUEUE FULL > condition and has been rock solid for me. > Latest revision: > sym-0.3.0-1990925 I decided to give this a try on an ASUS SC-875 (since I don't have an 896) to see what it would do. It's stable and seems to give similar performance to the ncr driver on make buildworld's (src on scsi, obj on ide). It's about 30% slower than the ncr driver with dump however. I was dumping from file systems on da1 to files on da0 (a syquest syjet removable scsi). The sym driver gave me about 1125 - 1250 KBytes per second throughput. The ncr driver gave about 1550 - 1725 KBytes per second as reported by dump. I tried these dumps a couple of times each with similar numbers. These are medium size (400M - 750M) dumps. Small file systems (eg root) were closer in speed with a slight edge to the ncr. Info from dmesg: ncr0: <ncr 53c875 fast20 wide scsi> irq 19 at device 9.0 on pci0 or for the sym: sym0: <875> irq 19 at device 9.0 on pci0 sym0: Symbios NVRAM, ID 7, Fast-20, parity checking sym0: open drain IRQ line driver, using on-chip SRAM ... sym0: Downloading SCSI SCRIPTS. (noperiph:sym0:0:-1:-1): SCSI bus reset delivered. changing root device to da1s1a da0 at sym0 bus 0 target 0 lun 0 da0: <SyQuest SyJet-S 0095> Removable Direct Access SCSI-2 device da0: 10.000MB/s transfers (10.000MHz, offset 15), Tagged Queueing Enabled da0: 1430MB (2929800 512 byte sectors: 255H 63S/T 182C) da1 at sym0 bus 0 target 8 lun 0 da1: <IBM DNES-309170W SA30> Fixed Direct Access SCSI-3 device da1: 40.000MB/s transfers (20.000MHz, offset 16, 16bit), Tagged Queueing Enabled da1: 8748MB (17916240 512 byte sectors: 255H 63S/T 1115C) -- Kevin Street street@iname.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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