https://bugzilla.kernel.org/show_bug.cgi?id=20072 Summary: tapeinfo reports MaxBlock: 16777215 but writes with blocksize >2M fail Product: IO/Storage Version: 2.5 Kernel Version: 2.6.32.21 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: SCSI AssignedTo: linux-scsi@xxxxxxxxxxxxxxx ReportedBy: lkolbe@xxxxxxxxxxxxxxxxxxxxxxxx CC: sfrey@xxxxxxxxxxxxxxxxxxxxxxxx Regression: No Created an attachment (id=33222) --> (https://bugzilla.kernel.org/attachment.cgi?id=33222) lsscsi of system As subject says, tapeinfo reports the tape drives (IBM ULTRIUM-HH4) support 16M Blocksize, but writing in blocksizes bigger than 2M fail root@shepherd:~# tapeinfo -f /dev/nst0 Product Type: Tape Drive Vendor ID: 'IBM ' Product ID: 'ULTRIUM-HH4 ' Revision: '85V3' Attached Changer API: No SerialNumber: '1K10014452' MinBlock: 1 MaxBlock: 16777215 SCSI ID: 0 SCSI LUN: 0 Ready: yes BufferedMode: yes Medium Type: 0x48 Density Code: 0x46 BlockSize: 0 DataCompEnabled: yes DataCompCapable: yes DataDeCompEnabled: yes CompType: 0x1 DeCompType: 0x1 BOP: yes Block Position: 0 Partition 0 Remaining Kbytes: -1 Partition 0 Size in Kbytes: -1 ActivePartition: 0 EarlyWarningSize: 0 dd tests: root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=2M count=4 4+0 records in 4+0 records out 8388608 bytes (8.4 MB) copied, 7.52488 s, 1.1 MB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=4M count=4 dd: writing `/dev/nst0': Device or resource busy 1+0 records in 0+0 records out 0 bytes (0 B) copied, 1.84202 s, 0.0 kB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=8M count=4 dd: writing `/dev/nst0': Device or resource busy 1+0 records in 0+0 records out 0 bytes (0 B) copied, 1.76087 s, 0.0 kB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=16M count=4 dd: writing `/dev/nst0': Invalid argument 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.00986913 s, 0.0 kB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=15M count=4 dd: writing `/dev/nst0': Value too large for defined data type 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.00954276 s, 0.0 kB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=16777215 count=4 dd: writing `/dev/nst0': Value too large for defined data type 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.0102587 s, 0.0 kB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=16777214 count=4 dd: writing `/dev/nst0': Value too large for defined data type 1+0 records in 0+0 records out 0 bytes (0 B) copied, 0.0100916 s, 0.0 kB/s root@shepherd:~# dd if=/dev/zero of=/dev/nst0 bs=2M count=4 4+0 records in 4+0 records out 8388608 bytes (8.4 MB) copied, 1.76435 s, 4.8 MB/s lspci -vvvn and lsscsi -v are attached; do you need more info? -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. -- 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
