Hi,
With 2.6.17.2, if a FC device is in use (mounted FS), a scan error is reported
when recovering after a 'long' link down period (>30s, 'no device timeout').
Then, devices aren't detected again (and oops are generated when reloading HBA
drivers, but this may be a side effect).
We have this issue with point to point configuration using:
- Emulex + DDN
- Emulex + NEC
- QLogic + DDN
- QLogic + NEC
In all cases, we got the message "Unexpected response from lun 0 while scanning,
scan aborted" in the scsi_report_lun_scan function (scsi_scan.c) and I'm
thinking there's something wrong when calling scsi_probe_and_add_lun.
We don't have such error if devices aren't used (not mounted) when link failure
occurs.
Do you know if such issue has already been encountered ?
May be an already existing patch ? (I look for scsi_probe_and_add_lun in the
mailling list but didn't find any revelant message)
Here are the extracts from syslog about these errors:
lpfc + DDN:
===========
...
Jul 3 09:15:30 s_kernel@iotiger2 kernel: lpfc 0000:06:02.0: 0:1305 Link Down
Event x2 received Data: x2 x20 x0
Jul 3 09:16:00 s_kernel@iotiger2 kernel: lpfc 0000:06:02.0: 0:0203 Nodev
timeout on WWPN 23:0:0:1:ff:3:2:a8 NPort xef Data: x8 x7 x0
Jul 3 09:16:05 s_kernel@iotiger2 kernel: rport-2:0-0: blocked FC remote port
time out: removing target and saving binding
Jul 3 09:17:01 s_kernel@iotiger2 kernel: lpfc 0000:06:02.0: 0:1303 Link Up
Event x3 received Data: x3 x1 x8 x2
Jul 3 09:17:01 s_kernel@iotiger2 kernel: Vendor: DDN Model: S2A 8500
Rev: 5.22
Jul 3 09:17:01 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 03
Jul 3 09:17:01 s_kernel@iotiger2 kernel: SCSI device sdd: 571416576 512-byte
hdwr sectors (292565 MB)
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sdd: Write Protect is off
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sdd: Mode Sense: a7 00 10 08
Jul 3 09:17:01 s_kernel@iotiger2 kernel: SCSI device sdd: drive cache: write
back w/ FUA
Jul 3 09:17:01 s_kernel@iotiger2 kernel: SCSI device sdd: 571416576 512-byte
hdwr sectors (292565 MB)
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sdd: Write Protect is off
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sdd: Mode Sense: a7 00 10 08
Jul 3 09:17:01 s_kernel@iotiger2 kernel: SCSI device sdd: drive cache: write
back w/ FUA
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sdd: unknown partition table
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sd 2:0:0:0: Attached scsi disk sdd
Jul 3 09:17:01 s_kernel@iotiger2 kernel: sd 2:0:0:0: Attached scsi generic sg4
type 0
Jul 3 09:17:01 s_kernel@iotiger2 kernel: Vendor: DDN Model: S2A 8500
Rev: 5.22
Jul 3 09:17:01 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 03
Jul 3 09:17:01 s_kernel@iotiger2 kernel: error 1
Jul 3 09:17:01 s_kernel@iotiger2 kernel: 2:0:0:0: Unexpected response from lun
0 while scanning, scan aborted
...
lpfc + NEC:
===========
...
Jul 4 06:11:44 s_kernel@iotiger2 kernel: EXT3 FS on sdg, internal journal
Jul 4 06:11:44 s_kernel@iotiger2 kernel: EXT3-fs: recovery complete.
Jul 4 06:11:44 s_kernel@iotiger2 kernel: EXT3-fs: mounted filesystem with
ordered data mode.
Jul 4 06:12:03 s_kernel@iotiger2 kernel: lpfc 0000:06:02.1: 1:1305 Link Down
Event x2 received Data: x2 x20 x0
Jul 4 06:12:33 s_kernel@iotiger2 kernel: lpfc 0000:06:02.1: 1:0203 Nodev
timeout on WWPN 20:6:0:0:13:84:0:35 NPort xdc Data: x8 x7 x0
Jul 4 06:12:38 s_kernel@iotiger2 kernel: rport-3:0-0: blocked FC remote port
time out: removing target and saving binding
Jul 4 06:12:42 s_kernel@iotiger2 kernel: lpfc 0000:06:02.1: 1:1303 Link Up
Event x3 received Data: x3 x1 x8 x2
Jul 4 06:12:42 s_kernel@iotiger2 kernel: Vendor: NEC Model: iStorage 2000
Rev: 2800
Jul 4 06:12:42 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 04
Jul 4 06:12:42 s_kernel@iotiger2 kernel: SCSI device sdh: 138412032 512-byte
hdwr sectors (70867 MB)
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sdh: Write Protect is off
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sdh: Mode Sense: 97 00 00 08
Jul 4 06:12:42 s_kernel@iotiger2 kernel: SCSI device sdh: drive cache: write back
Jul 4 06:12:42 s_kernel@iotiger2 kernel: SCSI device sdh: 138412032 512-byte
hdwr sectors (70867 MB)
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sdh: Write Protect is off
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sdh: Mode Sense: 97 00 00 08
Jul 4 06:12:42 s_kernel@iotiger2 kernel: SCSI device sdh: drive cache: write back
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sdh: unknown partition table
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sd 3:0:0:0: Attached scsi disk sdh
Jul 4 06:12:42 s_kernel@iotiger2 kernel: sd 3:0:0:0: Attached scsi generic sg12
type 0
Jul 4 06:12:42 s_kernel@iotiger2 kernel: Vendor: NEC Model: iStorage 2000
Rev: 2800
Jul 4 06:12:42 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 04
Jul 4 06:12:42 s_kernel@iotiger2 kernel: error 1
Jul 4 06:12:42 s_kernel@iotiger2 kernel: 3:0:0:0: Unexpected response from lun
0 while scanning, scan aborted
...
QLogic+NEC
==========
...
Jul 4 09:47:10 s_kernel@iotiger2 kernel: qla2400 0000:07:01.1: LIP reset
occured (f8ef).
Jul 4 09:47:10 s_kernel@iotiger2 kernel: qla2400 0000:07:01.1: LOOP DOWN
detected (2).
Jul 4 09:47:14 s_kernel@iotiger2 kernel: qla2400 0000:07:01.0: LOOP DOWN
detected (2).
Jul 4 09:47:45 s_kernel@iotiger2 kernel: rport-9:0-0: blocked FC remote port
time out: removing target and saving binding
Jul 4 09:47:50 s_kernel@iotiger2 kernel: rport-8:0-0: blocked FC remote port
time out: removing target and saving binding
Jul 4 09:48:11 s_kernel@iotiger2 kernel: qla2400 0000:07:01.0: LIP reset
occured (f7f7).
Jul 4 09:48:11 s_kernel@iotiger2 kernel: qla2400 0000:07:01.0: LIP occured (f7f7).
Jul 4 09:48:11 s_kernel@iotiger2 kernel: qla2400 0000:07:01.0: LOOP UP detected
(2 Gbps).
Jul 4 09:48:11 s_kernel@iotiger2 kernel: Vendor: NEC Model: iStorage 2000
Rev: 2800
Jul 4 09:48:11 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 04
Jul 4 09:48:11 s_kernel@iotiger2 kernel: SCSI device sdi: 138412032 512-byte
hdwr sectors (70867 MB)
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sdi: Write Protect is off
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sdi: Mode Sense: 97 00 00 08
Jul 4 09:48:11 s_kernel@iotiger2 kernel: SCSI device sdi: drive cache: write back
Jul 4 09:48:11 s_kernel@iotiger2 kernel: SCSI device sdi: 138412032 512-byte
hdwr sectors (70867 MB)
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sdi: Write Protect is off
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sdi: Mode Sense: 97 00 00 08
Jul 4 09:48:11 s_kernel@iotiger2 kernel: SCSI device sdi: drive cache: write back
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sdi: unknown partition table
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sd 8:0:0:0: Attached scsi disk sdi
Jul 4 09:48:11 s_kernel@iotiger2 kernel: sd 8:0:0:0: Attached scsi generic sg14
type 0
Jul 4 09:48:11 s_kernel@iotiger2 kernel: Vendor: NEC Model: iStorage 2000
Rev: 2800
Jul 4 09:48:11 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 04
Jul 4 09:48:11 s_kernel@iotiger2 kernel: error 1
Jul 4 09:48:11 s_kernel@iotiger2 kernel: 8:0:0:0: Unexpected response from lun
0 while scanning, scan aborted
...
QLogic+DDN
==========
...
Jul 4 10:01:31 s_kernel@iotiger2 kernel: qla2400 0000:07:01.1: LOOP DOWN
detected (2).
Jul 4 10:02:06 s_kernel@iotiger2 kernel: rport-9:0-0: blocked FC remote port
time out: removing target and saving binding
Jul 4 10:03:05 s_kernel@iotiger2 kernel: qla2400 0000:07:01.1: LIP reset
occured (f7f7).
Jul 4 10:03:05 s_kernel@iotiger2 kernel: qla2400 0000:07:01.1: LIP occured (f7f7).
Jul 4 10:03:05 s_kernel@iotiger2 kernel: qla2400 0000:07:01.1: LOOP UP detected
(2 Gbps).
Jul 4 10:03:05 s_kernel@iotiger2 kernel: Vendor: DDN Model: S2A 8500
Rev: 5.22
Jul 4 10:03:05 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 03
Jul 4 10:03:05 s_kernel@iotiger2 kernel: SCSI device sdl: 571416576 512-byte
hdwr sectors (292565 MB)
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sdl: Write Protect is off
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sdl: Mode Sense: a7 00 10 08
Jul 4 10:03:05 s_kernel@iotiger2 kernel: SCSI device sdl: drive cache: write
back w/ FUA
Jul 4 10:03:05 s_kernel@iotiger2 kernel: SCSI device sdl: 571416576 512-byte
hdwr sectors (292565 MB)
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sdl: Write Protect is off
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sdl: Mode Sense: a7 00 10 08
Jul 4 10:03:05 s_kernel@iotiger2 kernel: SCSI device sdl: drive cache: write
back w/ FUA
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sdl: unknown partition table
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sd 9:0:0:0: Attached scsi disk sdl
Jul 4 10:03:05 s_kernel@iotiger2 kernel: sd 9:0:0:0: Attached scsi generic sg15
type 0
Jul 4 10:03:05 s_kernel@iotiger2 kernel: Vendor: DDN Model: S2A 8500
Rev: 5.22
Jul 4 10:03:05 s_kernel@iotiger2 kernel: Type: Direct-Access
ANSI SCSI revision: 03
Jul 4 10:03:05 s_kernel@iotiger2 kernel: error 1
Jul 4 10:03:05 s_kernel@iotiger2 kernel: 9:0:0:0: Unexpected response from lun
0 while scanning, scan aborted
...
--
Frederic TEMPORELLI
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