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Author Topic: SCSI CD-ROM issue - can read directories, but can't load files!  (Read 1266 times)

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Offline mingleTopic starter

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SCSI CD-ROM issue - can read directories, but can't load files!
« on: December 08, 2008, 06:52:00 AM »
Hi,

I have a rather annoying issue with an older (1992 vintage) SCSI CD-ROM drive and my Amiga 1200 (+ Blizzard 030/SCSI).

When I pop a disk in, it can see the disk fine and can read all the directories without any issues, the only problem is I can't load/read/run any of the files on the CD. I get an Amiga DOS error saying cannot open the tool/file or whatever I'm trying to use.

It's not an issue with the drive, as far as I can see, since it appears to be correctly connected and is visible in the SCSI Tools device list - and of course it reads the CDs fine...

The drive is an old 'flip-top' (ala-CD32) drive, an NEC CDR-25BJ.

I suspect it may be something to do with the AmiCDFS mountlist for the device, but I'm not sure what I need to change/try.

Here's the mountlist I'm currently using:

-----

 * $VER: CD0 2.36 (22.08.96)
 *
 * CD-ROM filesystem mount entry
 */

Device      = 1230scsi.device
Unit      = 5
FileSystem   = L:AmiCDFS
Flags      = 0
BlocksPerTrack   = 32
BlockSize   = 2048
Reserved   = 0
LowCyl      = 0
HighCyl      = 11000
Surfaces   = 1
Buffers      = 64
BufMemType   = 1
Mask            = 0x7fffffff
GlobVec      = -1
Priority   = 10
DosType      = 0x43444653
StackSize   = 600
Mount      = 1

Control      = "LC BL=8 FB=32"

/* Control field template:
 *
 * LC=LOWERCASE/S,CS=CASESENSE/S,
 * HF=HFSFIRST/S,TD=TRACKDISK/S,
 * BL=BUFFERLINES/K/N,FB=FILEBUFFERS/K/N,
 * DC=DISKCHANGE/K/N,MT=MOTORTIME/K/N,
 * SD=STARTDELAY/K/N,TDC=TDCHANGE/S,
 * TOSHIBA/S,OLDMODE/S
 */

-----

... any thing else I should look at or try to change?

Cheers,

Mike.
 

Offline mingleTopic starter

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Re: SCSI CD-ROM issue - can read directories, but can't load files!
« Reply #1 on: December 08, 2008, 10:44:42 PM »
Hi Thomas,

Thanks for the info... I gave it a try, but it didn't make much difference.

However, I managed to get it working - I think it may have been a hardware issue after all!

I took the drive apart and put some more grease on the guide-rods for the read-head and when I put it back together it worked...

Very strange. Before I took it apart I experimented with what files it could actually read. It would do a file-search of the entire disk without any issues. It would also display any icons (.info files) without any issues. I could also get it do display a few text files. But most of the time it would start to read the file, then it sounded like it would 'choke' on the file and spin-down, then try to spin up again... and again... I thought perhaps the disk was 'slipping' on the spindle - since it wasn't held very firmly...

Anyway, it now works, altough since it's a 2x speed drive, it's pretty slow!

Thanks again for your suggestions!

Cheers,

Mike.