This is a known side effect of removing a fibre target which has references. There is a crude workaround available. Essentially, it modifies the fc transport to not delete the target when the timer expires. http://marc.theaimsgroup.com/?l=linux-scsi&m=115015423722568&w=2 Root cause is being investigated by various interested parties. Be sure to read the entire thread. This patch is not going to be accepted into the kernel. More interesting threads: http://marc.theaimsgroup.com/?l=linux-scsi&m=114979410315677&w=2 http://marc.theaimsgroup.com/?l=linux-scsi&m=115039021604020&w=2 http://marc.theaimsgroup.com/?l=linux-scsi&m=115039057504409&w=2 http://marc.theaimsgroup.com/?l=linux-scsi&m=115134812215106&w=2 Be sure to read the complete thread before applying any of the patches.... Mike Frederic TEMPORELLI wrote: > 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 > ... > - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
