lkml.org 
[lkml]   [2001]   [May]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectProblems even with 512 block size MOs
Hallo

recent 2.4 kernels have incredible bad performance for me when handling MO
drives. Going back 2.2 shows better performance.

This is my setup:
SCSI subsystem driver Revision: 1.00
ncr53c8xx: at PCI bus 0, device 15, function 0
ncr53c8xx: 53c810 detected
ncr53c810-0: rev 0x2 on pci bus 0 device 15 function 0 irq 16
ncr53c810-0: ID 7, Fast-10, Parity Checking
scsi0 : ncr53c8xx-3.4.3-20010212
Vendor: FUJITSU Model: M2513A Rev: 1500
Type: Optical Device ANSI SCSI revision: 02
Vendor: PIONEER Model: DVD-ROM DVD-303 Rev: 1.10
Type: CD-ROM ANSI SCSI revision: 02
Detected scsi removable disk sda at scsi0, channel 0, id 0, lun 0
ncr53c810-0-<0,*>: FAST-10 SCSI 10.0 MB/s (100 ns, offset 8)
SCSI device sda: 248826 512-byte hdwr sectors (127 MB)
sda: Write Protect is off
sda: unknown partition table

on a non-overclocked Dual celeron BP6 machine with 256MByte RAM

hertz:~> uname -a
Linux hertz 2.4.4-SMP #2 SMP Wed May 2 17:47:22 MEST 2001 i686 unknown
(recent kernel from ftp.suse.com/people/mantel/next)

Copying a 6.5 MByte file with cp returns nearly immediately on the
commandline, but umount nearly takes forever. Maximum rate detected by
xosview during umount was about 30 kByte.

I have similar behaviour on another machine and with different disk. However
I don't get any "dmesg" output despite the "CONFIG_SCSI_LOGGING=y" option on
both machines.

Are all my MO disks rotten? Are the MO drives broken? Are my SCSI adapters
broken? Or is there a bug in the SCSI layer?

Bye

--
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.031 / U:4.656 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site