Re: 2.1.117: mcdx drives me nuts

Ragnar Hojland Espinosa (ragnar@lightside.ddns.org)
Thu, 27 Aug 1998 20:50:37 +0200 (MET DST)


Compiled mcd and kernel with gcc 2.7.2.3, 2.1.118, UP

lightside:~# modprobe mcdSysRq: Log level set to 9

Uniform CDROM driver Revision: 2.13
mcd: Mitsumi Double Speed CD-ROM at port=0x300, irq=11
lightside:~# mount /dev/mcd0 /cdrom
Disk Info: first 1 last 1 length 00:00.00 first 00:00.00
i = 1 ctl-adr = 41 track 0 px 01 02:15.46 00:02.00
i = 100 ctl-adr = 41 track 0 px A0 02:15.39 01:00.00
i = 101 ctl-adr = 41 track 0 px A1 02:15.41 01:00.00
i = 102 ctl-adr = 41 track 0 px A2 02:15.44 68:39.04
mount: block device /dev/mcd0 is write-protected, mounting read-only

At this point, mount hangs on 'D', wchan = sync_buffer. Both the port and
irq are correct.

> mcd gives me about 298 K/s with my double speed drive so it must be a
> mcdx specific problem. At least 2.1.118 seems to solve the hang-on-mount
> problem which occured only at boot time.

mcd hangs here, so I'm afraid I can't test it. About the mcdx speed
tests:

dd if=a.dat of=/dev/null (size 4192Kb; cp offers similar results)
kernel Kb/sec (aprox.)
2.1.43 140
2.1.53 140
2.1.98+ 40 (led blinks a lot more)

copy a.dat c:
dos6.2 299

-- 
____/|  Ragnar Hojland  (ragnar@lightside.ddns.org)      Fingerprint  94C4B
\ o.O|                                                   2F0D27DE025BE2302C
 =(_)=  "Thou shalt not follow the NULL pointer for      104B78C56 B72F0822
   U     chaos and madness await thee at its end."       hkp://keys.pgp.com

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