Date: Sat, 22 Jul 2000 23:06:25 -0500 (CDT) From: Bruce Albrecht <bruce@zuhause.mn.org> To: freebsd-scsi@freebsd.org Subject: Transfer rate of LVD drives really 6.6 MB/s? Message-ID: <14714.28481.138432.42784@celery.zuhause.org>
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I recently bought a Tekram 390U2W controller and switched my IBM
DDRS-39130 (68 pin) drive from SE to LVD, and also attached an IBM
DRVS18D (SCA with a Corpsys LVD rated 80-68 converter), but instead of
seeing 80 MB/s transfers, the output from dmesg and camcontrol say 6.6
MB/s. What's up with this? I'm using the supplied 68 pin cable and
LVD/SE terminator supplied with the 390U2W controller. Even if I only
have the DDRS-39130 connected, I still see it claim 6.6MB/s. I'm running
4.0-stable from early June, probably around June 10-12. Here's some of
the messages from dmesg:
Copyright (c) 1992-2000 The FreeBSD Project.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 4.0-STABLE #0: Mon Jun 12 21:55:18 CDT 2000
root@celery.zuhause.org:/usr/local/usr.src/src/sys/compile/celery
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (465.50-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x665 Stepping = 5
Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory = 268369920 (262080K bytes)
config> q
avail memory = 257052672 (251028K bytes)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
IOAPIC #0 intpin 16 -> irq 11
IOAPIC #0 intpin 17 -> irq 5
IOAPIC #0 intpin 18 -> irq 9
IOAPIC #0 intpin 19 -> irq 10
FreeBSD/SMP: Multiprocessor motherboard
cpu0 (BSP): apic id: 0, version: 0x00040011, at 0xfee00000
cpu1 (AP): apic id: 1, version: 0x00040011, at 0xfee00000
io0 (APIC): apic id: 2, version: 0x00170011, at 0xfec00000
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
sym0: <895> port 0xd400-0xd4ff mem 0xec001000-0xec001fff,0xec003000-0xec0030ff irq 11 at device 8.0 on pci0
sym0: Tekram NVRAM, ID 7, Fast-40, LVD, parity checking
ahc0: <Adaptec aic7895 Ultra SCSI adapter> port 0xe000-0xe0ff mem 0xec002000-0xec002fff irq 11 at device 12.0 on pci0
ahc0: aic7895 Wide Channel A, SCSI Id=7, 16/255 SCBs
ahc1: <Adaptec aic7895 Ultra SCSI adapter> port 0xe400-0xe4ff mem 0xec004000-0xec004fff irq 11 at device 12.1 on pci0
ahc1: aic7895 Wide Channel B, SCSI Id=7, 16/255 SCBs
ahc1: Host Adapter Bios disabled. Using default SCSI device parameters
Mounting root from ufs:/dev/da0a
cd0 at ahc0 bus 0 target 5 lun 0
cd0: <TOSHIBA CD-ROM XM-6401TA 1009> Removable CD-ROM SCSI-2 device
cd0: 20.000MB/s transfers (20.000MHz, offset 15)
cd0: cd present [116374 x 2048 byte records]
da1 at sym0 bus 0 target 9 lun 0
da1: <IBM DRVS18D 0270> Fixed Direct Access SCSI-3 device
da1: 6.600MB/s transfers (16bit), Tagged Queueing Enabled
da1: 17519MB (35879135 512 byte sectors: 255H 63S/T 2233C)
da0 at sym0 bus 0 target 3 lun 0
da0: <IBM DDRS-39130D DC1B> Fixed Direct Access SCSI-2 device
da0: 6.600MB/s transfers (16bit), Tagged Queueing Enabled
da0: 8715MB (17850000 512 byte sectors: 255H 63S/T 1111C)
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