14:10:48 root: writing to the tape next
14:11:01 kernel: qc_issue: CDB 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00
14:11:01 kernel: qc_issue_prot: CDB 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00
14:11:01 kernel: qc_issue: CDB 03 00 00 00 60 00 00 00 00 00 00 00 00 00
00 00
14:11:01 kernel: qc_issue_prot: CDB 03 00 00 00 60 00 00 00 00 00 00 00 00 00
00 00
14:11:01 kernel: ata3: DRQ=1 with device error, dev_stat 0x59
14:11:01 kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
frozen
14:11:01 kernel: ata3.00: cmd a0/00:00:00:00:20/00:00:00:00:00/a0 tag 0 cdb 0x0
data 0
14:11:01 kernel: res 51/60:03:00:00:20/00:00:00:00:00/a0 Emask 0x3
(HSM violation)
14:11:01 kernel: ata3: soft resetting port
...
Okay, if I simply change the code to ignore the test
for "DRQ=1 with device error", things appear to work.
14:26:48 root: writing
14:26:54 kernel: qc_issue: CDB 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
14:26:54 kernel: qc_issue_prot: CDB 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00
14:26:54 kernel: qc_issue: CDB 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
14:26:54 kernel: qc_issue_prot: CDB 05 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00
14:26:54 kernel: qc_issue: CDB 03 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
14:26:54 kernel: qc_issue_prot: CDB 03 00 00 00 60 00 00 00 00 00 00 00 00 00
00 00
14:26:54 kernel: ata3: DRQ=1 with device error, dev_stat 0x59
14:26:54 kernel: st0: Sense Key : Illegal Request [current]
14:26:54 kernel: st0: Add. Sense: Invalid command operation code
14:26:54 kernel: qc_issue: CDB 1a 00 00 00 0c 00 00 00 00 00 00 00 00 00 00 00
14:26:54 kernel: qc_issue_prot: CDB 1a 00 00 00 0c 00 00 00 00 00 00 00 00 00
00 00
14:26:54 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:26:54 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
14:27:01 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:27:01 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
14:27:01 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:27:01 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
14:27:01 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:27:01 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
14:27:01 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:27:01 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
14:27:01 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:27:01 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
14:27:01 kernel: qc_issue: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00 00 00
14:27:01 kernel: qc_issue_prot: CDB 0a 01 00 00 08 00 00 00 00 00 00 00 00 00
00 00
I can read and write the tape successfully, and the written data matches
what is later read back from it.
Here's the hack I used. Not ready for mainline, but perhaps it will
help Alan or whomever come up with something nice for Jeff.
--- 2.6.23-rc6/drivers/ata/libata-core.c 2007-09-13 09:49:16.000000000 -0400
+++ linux/drivers/ata/libata-core.c 2007-09-13 14:15:57.000000000 -0400
@@ -4932,9 +4932,9 @@
if (unlikely(status & (ATA_ERR | ATA_DF))) {
ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device "
"error, dev_stat 0x%X\n", status);
- qc->err_mask |= AC_ERR_HSM;
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
+ //qc->err_mask |= AC_ERR_HSM;
+ //ap->hsm_task_state = HSM_ST_ERR;
+ //goto fsm_start;
}
/* Send the CDB (atapi) or the first data block (ata pio out).
-
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