Date: Tue, 2 Mar 1999 20:09:52 +0800 (HKT) From: Chan Yiu Wah <c5666305@hkstar.com> To: freebsd-current@freebsd.org Subject: anyone knows what does it mean Message-ID: <199903021209.UAA16465@b1.hkstar.com>
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Hello,
I recently compile the egcs-1.1.1 and the system report to me that the
ahc0:A:0 refuses tagged commands performance non-tagged I/O. The transfer
speed drop from 20.00M/s to 3.3 M/s. Is there anyone have the same problem ?
Cheers
Clarence
======= Part of the dmesg =======
da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DCAS-34330 S65A> Fixed Direct Access SCSI-2 device
da0: 3.300MB/s transfers, Tagged Queueing Enabled
^^^^^ poor performance drop from 20.00 to 3.3
da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)
da2 at ahc0 bus 0 target 2 lun 0
da2: <FUJITSU M2513A 1500> Removable Direct Access SCSI-2 device
da2: 10.000MB/s transfers (10.000MHz, offset 10)
da2: 508MB (1041500 512 byte sectors: 64H 32S/T 508C)
cd0 at ahc0 bus 0 target 3 lun 0
cd0: <PLEXTOR CD-ROM PX-20TS 1.00> Removable CD-ROM SCSI-2 device
cd0: 10.000MB/s transfers (10.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present
da1 at ahc0 bus 0 target 1 lun 0
da1: <IBM DCAS-32160W !# S63A> Fixed Direct Access SCSI-2 device
da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da1: 2063MB (4226725 512 byte sectors: 255H 63S/T 263C)
ahc0:A:0: refuses tagged commands. Performing non-tagged I/O
======= Part of the dmesg =======
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