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partition check fails to find a disk

daemon@ATHENA.MIT.EDU (apian@ise.fhg.de)
Thu Apr 9 06:09:04 1998

From: apian@ise.fhg.de
To: linux-scsi@vger.rutgers.edu
Date: 	Thu, 9 Apr 1998 12:04:13 +0200 (MESZ)

Hi folks,

aha1542 misses a disk on 2.0.31 and 2.0.33 ;
scenario:
	aic7xxx compiled into kernel, one disk (-> /dev/sda )
	aha1542 compiled as module, loaded after boot, 4 devices
		/dev/sda[bc] are found, checked, and work
		/dev/sdd is found, but later ignored
		/dev/sr0 is found and works (cd burner)

The disk at /dev/sdd is otherwise fine and works if mapped to /dev/sdb or sdc .
Apparently the forth disk is just plainly ignored:
	fdisk /dev/sdd
	Unable to open /dev/sdd
And its not checked for partitions (which it should, even if there aren't any
on it yet, right ?)
Disk, cables, terminators etc. where swapped and didn't influence anything.


dmesg:

	Configuring Adaptec (SCSI-ID 7) at IO:334, IRQ 15, DMA priority 6
	scsi2 : Adaptec 1542
	scsi : 2 hosts.
	  Vendor: QUANTUM   Model: LPS525S           Rev: 3100
	  Type:   Direct-Access                      ANSI SCSI revision: 02
	Detected scsi disk sdb at scsi2, channel 0, id 1, lun 0
	  Vendor: QUANTUM   Model: LPS525S           Rev: 3100
	  Type:   Direct-Access                      ANSI SCSI revision: 02
	Detected scsi disk sdc at scsi2, channel 0, id 2, lun 0
	  Vendor: HP        Model: C2247             Rev: 0BH4
	  Type:   Direct-Access                      ANSI SCSI revision: 02
	Detected scsi disk sdd at scsi2, channel 0, id 3, lun 0
	  Vendor: YAMAHA    Model: CDR100            Rev: 1.12
	  Type:   WORM                               ANSI SCSI revision: 02
	Detected scsi CD-ROM sr0 at scsi2, channel 0, id 6, lun 0
	SCSI device sdb: hdwr sector= 512 bytes. Sectors= 1023484 [499 MB] [0.5 GB]
	 sdb: sdb1
	SCSI device sdc: hdwr sector= 512 bytes. Sectors= 1023484 [499 MB] [0.5 GB]
	 sdc: sdc1
where's sdd ? -> 

more /proc/scsi/scsi:
	Attached devices: 
	Host: scsi0 Channel: 00 Id: 00 Lun: 00
	  Vendor: SEAGATE  Model: ST32550N         Rev: 8303
	  Type:   Direct-Access                    ANSI SCSI revision: 02
	Host: scsi2 Channel: 00 Id: 01 Lun: 00
	  Vendor: QUANTUM  Model: LPS525S          Rev: 3100
	  Type:   Direct-Access                    ANSI SCSI revision: 02
	Host: scsi2 Channel: 00 Id: 02 Lun: 00
	  Vendor: QUANTUM  Model: LPS525S          Rev: 3100
	  Type:   Direct-Access                    ANSI SCSI revision: 02
	Host: scsi2 Channel: 00 Id: 03 Lun: 00
	  Vendor: HP       Model: C2247            Rev: 0BH4
	  Type:   Direct-Access                    ANSI SCSI revision: 02
	Host: scsi2 Channel: 00 Id: 06 Lun: 00
	  Vendor: YAMAHA   Model: CDR100           Rev: 1.12
	  Type:   WORM                             ANSI SCSI revision: 02

Many thanks for hints on debugging this
Peter

-- 
 Peter Apian-Bennewitz	apian@ise.fhg.de  +49-761-4588-[123|302] 
 Fraunhofer Institute for Solar Energy Systems, D-79100 Freiburg
 http://www.ise.fhg.de/~apian

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