Hi Thomas, Need below information. 1. Dmesg or /var/log/messages 2. Which kernel version you are using? 3. Are you running any applications? 4. Whether tape drive is discovered or not? As I was working with this same drive only. I never faced any problem with this drive. 5. Check whether this is working with 2.6.33 kernels or not? -Srini -----Original Message----- From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi-owner@xxxxxxxxxxxxxxx] On Behalf Of Thomas Mueller Sent: Thursday, August 19, 2010 7:05 PM To: linux-scsi@xxxxxxxxxxxxxxx Subject: mvsas: blocked task on writing to tape hi recently upgraded the kernel from 2.6.32-bpo.4 to -bpo.5 on Debian Lenny. Since then, the tape drives don't work anymore. after some time writing to tape, it stopps working. I then compiled a vanilla 2.6.35.2 kernel to verify that the problem still exists - and it does (log below). debian kernel 2.6.32-bpo.4 is IMHO 2.6.32.11+patches debian kernel 2.6.32-bpo.5 is IMHO 2.6.32.15+patches Hardware: *Areca ARC-1300ix-16 (mvsas) * Quantum LTO-4 tape drives connected with SAS (1x standalone, 1x SuperLoader3 with Drive) - both having problems. - Thomas kernel messages from 2.6.35.2 (vanilla kernel.org): [ 1.303780] mvsas 0000:03:00.0: mvsas: driver version 0.8.2 [ 1.304219] mvsas 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 1.304349] mvsas 0000:03:00.0: setting latency timer to 64 [ 1.306623] mvsas 0000:03:00.0: mvsas: PCI-E x4, Bandwidth Usage: 2.5 Gbps [ 4.047535] scsi1 : mvsas [ 4.047961] drivers/scsi/mvsas/mv_sas.c 1260:set wide port phy map 1 [ 4.057892] drivers/scsi/mvsas/mv_sas.c 1260:set wide port phy map 3 [ 4.077741] drivers/scsi/mvsas/mv_sas.c 1260:set wide port phy map 7 [ 4.107512] drivers/scsi/mvsas/mv_sas.c 1260:set wide port phy map f ... [ 445.370604] st1: Block limits 1 - 16777215 bytes. <writing with btape (bacula tape test tool)> [ 1440.924322] INFO: task btape:4738 blocked for more than 120 seconds. [ 1440.924397] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1440.924488] btape D ffff88025caa6908 0 4738 4531 0x00000000 [ 1440.924646] ffff88025ec6b680 0000000000000082 000000010000000c 0000000000000010 [ 1440.924915] 00000000000154c0 ffff88025d4c1fd8 ffff88025d4c1fd8 ffff88025caa6630 [ 1440.925173] 00000000000154c0 00000000000154c0 00000000000154c0 ffff88025caa6630 [ 1440.925442] Call Trace: [ 1440.925521] [<ffffffff81304001>] ? schedule_timeout+0x2e/0xdd [ 1440.925592] [<ffffffff8117864a>] ? blk_peek_request+0x18f/0x1a3 [ 1440.925661] [<ffffffff81303e92>] ? wait_for_common+0xde/0x15b [ 1440.925732] [<ffffffff8103f832>] ? default_wake_function+0x0/0x9 [ 1440.925816] [<ffffffffa030009e>] ? st_do_scsi+0x2c4/0x2f4 [st] [ 1440.925887] [<ffffffff8103709d>] ? __wake_up+0x30/0x44 [ 1440.925956] [<ffffffffa03041b5>] ? st_write+0x615/0xa74 [st] [ 1440.926027] [<ffffffff810eb3c0>] ? vfs_write+0xa9/0x102 [ 1440.926095] [<ffffffff810eb4d5>] ? sys_write+0x45/0x6e [ 1440.926164] [<ffffffff81008a82>] ? system_call_fastpath+0x16/0x1b ... [ 2040.924074] INFO: task btape:4738 blocked for more than 120 seconds. [ 2040.924106] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2040.924152] btape D ffff88025caa6908 0 4738 4531 0x00000000 [ 2040.930407] ffff88025ec6b680 0000000000000082 000000010000000c 0000000000000010 [ 2040.930462] 00000000000154c0 ffff88025d4c1fd8 ffff88025d4c1fd8 ffff88025caa6630 [ 2040.930514] 00000000000154c0 00000000000154c0 00000000000154c0 ffff88025caa6630 [ 2040.930566] Call Trace: [ 2040.930596] [<ffffffff81304001>] ? schedule_timeout+0x2e/0xdd [ 2040.930626] [<ffffffff8117864a>] ? blk_peek_request+0x18f/0x1a3 [ 2040.930654] [<ffffffff81303e92>] ? wait_for_common+0xde/0x15b [ 2040.930689] [<ffffffff8103f832>] ? default_wake_function+0x0/0x9 [ 2040.930739] [<ffffffffa030009e>] ? st_do_scsi+0x2c4/0x2f4 [st] [ 2040.930771] [<ffffffff8103709d>] ? __wake_up+0x30/0x44 [ 2040.930803] [<ffffffffa03041b5>] ? st_write+0x615/0xa74 [st] [ 2040.930845] [<ffffffff810eb3c0>] ? vfs_write+0xa9/0x102 [ 2040.930872] [<ffffffff810eb4d5>] ? sys_write+0x45/0x6e [ 2040.930902] [<ffffffff81008a82>] ? system_call_fastpath+0x16/0x1b [ 2142.769455] drivers/scsi/mvsas/mv_sas.c 1716:mvs_abort_task:rc= -5 [ 2160.928073] INFO: task btape:4738 blocked for more than 120 seconds. [ 2160.928105] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2160.928150] btape D ffff88025caa6908 0 4738 4531 0x00000000 [ 2160.928188] ffff88025ec6b680 0000000000000082 000000010000000c 0000000000000010 [ 2160.928238] 00000000000154c0 ffff88025d4c1fd8 ffff88025d4c1fd8 ffff88025caa6630 [ 2160.928301] 00000000000154c0 00000000000154c0 00000000000154c0 ffff88025caa6630 [ 2160.928351] Call Trace: [ 2160.928381] [<ffffffff81304001>] ? schedule_timeout+0x2e/0xdd [ 2160.928413] [<ffffffff8117864a>] ? blk_peek_request+0x18f/0x1a3 [ 2160.928450] [<ffffffff81303e92>] ? wait_for_common+0xde/0x15b [ 2160.928480] [<ffffffff8103f832>] ? default_wake_function+0x0/0x9 [ 2160.928523] [<ffffffffa030009e>] ? st_do_scsi+0x2c4/0x2f4 [st] [ 2160.928552] [<ffffffff8103709d>] ? __wake_up+0x30/0x44 [ 2160.928580] [<ffffffffa03041b5>] ? st_write+0x615/0xa74 [st] [ 2160.928610] [<ffffffff810eb3c0>] ? vfs_write+0xa9/0x102 [ 2160.928637] [<ffffffff810eb4d5>] ? sys_write+0x45/0x6e [ 2160.928665] [<ffffffff81008a82>] ? system_call_fastpath+0x16/0x1b [ 2166.914940] drivers/scsi/mvsas/mv_sas.c 1632:mvs_query_task:rc= 0 [ 2172.884346] drivers/scsi/mvsas/mv_sas.c 1586:mvs_I_T_nexus_reset for device[2]:rc= 0 [ 2172.884354] drivers/scsi/mvsas/mv_sas.c 1967:Release slot [0] tag[0], task [ffff880250668fc0]: [ 2172.884380] st1: Error 50000 (driver bt 0x0, host bt 0x5). -- To unsubscribe from this list: 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 DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. 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