Bug 223761

Summary:	Kudzu does not find Tape drive's correct "device name" in RHEL5 , but it does in RHEL3 and RHEL4.
Product:	Red Hat Enterprise Linux 5	Reporter:	YangKun <ykun>
Component:	kudzu	Assignee:	Bill Nottingham <notting>
Status:	CLOSED NOTABUG	QA Contact:	David Lawrence <dkl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5.0	CC:	gnichols, rvokal, yshao
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-02-14 15:20:05 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description YangKun 2007-01-22 08:44:35 UTC

Description of problem:
The kudzu shipped in RHEL5(kernel : 2.6.18-1.2910.el5xen) can not find the 
correct tape drive's "device name", is this an intended change ?
Following is the related part in /etc/sysconfig/hwconfig :
-----------------------------
class: TAPE
bus: SCSI
detached: 0
device: sg2
desc: "HP Ultrium 1-SCSI"
host: 2
id: 4
channel: 0
lun: 0
-----------------------------
the correct device name for this tape drive should be "st0"(/dev/st0)


But in RHEL3 and RHEL4 , it does can find tape drive's "device name", following 
are two examples:

##########################
Red Hat Enterprise Linux AS release 3 (Taroon Update 6)
-
class: TAPE
bus: SCSI
detached: 0
device: st0
driver: ignore
desc: "Quantum SDLT320"
host: 0
id: 1
channel: 5
lun: 0
generic: sg2
-


##########################
Red Hat Enterprise Linux AS release 4 (Nahant Update 1)
-
class: TAPE
bus: SCSI
detached: 0
device: st0
driver: ignore
desc: "Hp C5683A"
host: 2
id: 3
channel: 0
lun: 0
generic: sg7
-
-----------------------------------------------------------------

Comment 1 Bill Nottingham 2007-01-22 18:34:54 UTC

Is st loaded?

Comment 2 YangKun 2007-01-23 07:20:48 UTC

Yes , the st driver is loaded and I can see it in dmesg:
--------------------------
....
hdb: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33)
st: Version 20050830, fixed bufsize 32768, s/g segs 256
st 2:0:4:0: Attached scsi tape st0
st0: try direct i/o: yes (alignment 512 B)
lp: driver loaded but no devices found
SELinux: initialized (dev ramfs, type ramfs), uses genfs_contexts
....
--------------------------

Comment 3 Bill Nottingham 2007-01-23 16:30:39 UTC

What's in /sys/bus/scsi/devices/XXXX for the device?

Comment 4 YangKun 2007-01-24 05:40:57 UTC

<13:38:40 kun@yangkun>$ ll bus/scsi/devices/
total 12
lrwxrwxrwx 1 kun kun 66 Jan 24 11:03 0:0:0:0 ->
../../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/
lrwxrwxrwx 1 kun kun 66 Jan 24 11:03 1:0:0:0 ->
../../../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/
lrwxrwxrwx 1 kun kun 79 Jan 24 11:03 2:0:4:0 ->
../../../devices/pci0000:00/0000:00:1e.0/0000:05:04.0/host2/target2:0:4/2:0:4:0/
<13:40:11 kun@yangkun>$ ll bus/scsi/devices/2\:0\:4\:0/
total 60
lrwxrwxrwx 1 kun kun   29 Jan 24 11:03 bus -> ../../../../../../../bus/scsi/
-r--r--r-- 1 kun kun    2 Jan 23 17:10 device_blocked
lrwxrwxrwx 1 kun kun   40 Jan 24 11:03 driver ->
../../../../../../../bus/scsi/drivers/st/
lrwxrwxrwx 1 kun kun   43 Jan 24 11:03 generic ->
../../../../../../../class/scsi_generic/sg2/
-r--r--r-- 1 kun kun    3 Jan 23 17:10 iocounterbits
-r--r--r-- 1 kun kun    4 Jan 23 17:10 iodone_cnt
-r--r--r-- 1 kun kun    4 Jan 23 17:10 ioerr_cnt
-r--r--r-- 1 kun kun    4 Jan 23 17:10 iorequest_cnt
-r--r--r-- 1 kun kun   17 Jan 23 17:10 model
drwxr-xr-x 2 kun kun 4096 Jan 19 00:36 power/
-r--r--r-- 1 kun kun    2 Jan 23 17:10 queue_depth
-r--r--r-- 1 kun kun    5 Jan 23 17:10 queue_type
-r--r--r-- 1 kun kun    5 Jan 23 17:10 rev
lrwxrwxrwx 1 kun kun   46 Jan 24 11:03 scsi_device:2:0:4:0 ->
../../../../../../../class/scsi_device/2:0:4:0/
lrwxrwxrwx 1 kun kun   43 Jan 24 11:03 scsi_generic:sg2 ->
../../../../../../../class/scsi_generic/sg2/
-r--r--r-- 1 kun kun    2 Jan 23 17:10 scsi_level
lrwxrwxrwx 1 kun kun   41 Jan 24 11:03 scsi_tape:nst0 ->
../../../../../../../class/scsi_tape/nst0/
lrwxrwxrwx 1 kun kun   42 Jan 24 11:03 scsi_tape:nst0a ->
../../../../../../../class/scsi_tape/nst0a/
lrwxrwxrwx 1 kun kun   42 Jan 24 11:03 scsi_tape:nst0l ->
../../../../../../../class/scsi_tape/nst0l/
lrwxrwxrwx 1 kun kun   42 Jan 24 11:03 scsi_tape:nst0m ->
../../../../../../../class/scsi_tape/nst0m/
lrwxrwxrwx 1 kun kun   40 Jan 24 11:03 scsi_tape:st0 ->
../../../../../../../class/scsi_tape/st0/
lrwxrwxrwx 1 kun kun   41 Jan 24 11:03 scsi_tape:st0a ->
../../../../../../../class/scsi_tape/st0a/
lrwxrwxrwx 1 kun kun   41 Jan 24 11:03 scsi_tape:st0l ->
../../../../../../../class/scsi_tape/st0l/
lrwxrwxrwx 1 kun kun   41 Jan 24 11:03 scsi_tape:st0m ->
../../../../../../../class/scsi_tape/st0m/
-rw-r--r-- 1 kun kun    8 Jan 23 17:10 state
lrwxrwxrwx 1 kun kun   29 Jan 24 11:03 subsystem -> ../../../../../../../bus/scsi/
lrwxrwxrwx 1 kun kun   40 Jan 24 11:03 tape ->
../../../../../../../class/scsi_tape/st0/
-rw-r--r-- 1 kun kun    4 Jan 19 00:35 timeout
-r--r--r-- 1 kun kun    2 Jan 23 17:10 type
-r--r--r-- 1 kun kun    9 Jan 23 17:10 vendor
<13:40:20 kun@yangkun>$ ll bus/scsi/devices/2\:0\:4\:0/tape/
total 24
-r--r--r-- 1 kun kun  3 Jan 23 17:10 default_blksize
-r--r--r-- 1 kun kun  3 Jan 23 17:10 default_compression
-r--r--r-- 1 kun kun  3 Jan 23 17:10 default_density
-r--r--r-- 1 kun kun  2 Jan 23 17:10 defined
-r--r--r-- 1 kun kun  4 Jan 23 17:10 dev
lrwxrwxrwx 1 kun kun 79 Jan 24 11:03 device ->
../../../devices/pci0000:00/0000:00:1e.0/0000:05:04.0/host2/target2:0:4/2:0:4:0/
lrwxrwxrwx 1 kun kun 24 Jan 24 11:03 subsystem -> ../../../class/scsi_tape/
<13:40:48 kun@yangkun>$