Mark Whidby wrote:
Hi,
I'm trying to configure a RAID box with 12 x 1 Tb disks on an SL 5.0 system
running kernel 2.6.18-8.1.8.el5 through this controller:
04:06.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X
Fusion-MPT Dual Ultra320 SCSI (rev 08)
However, whenever I configure more than 3 of the disks in a LUN I get
SCSI errors.
For 4 disks in a RAID5 configuration:-
Nov 4 10:36:29 terra kernel: Vendor: transtec Model:
PV610S12R1A Rev: 347G
Nov 4 10:36:29 terra kernel: Type:
Direct-Access ANSI SCSI revision: 05
Nov 4 10:36:29 terra kernel: sdq : very big device. try to use READ
CAPACITY(16).
Nov 4 10:36:29 terra kernel: SCSI device sdq: 5858973696 512-byte hdwr
sectors (2999795 MB)
Nov 4 10:36:29 terra kernel: sdq: Write Protect is off
Nov 4 10:36:29 terra kernel: SCSI device sdq: drive cache: write back
Nov 4 10:36:29 terra kernel: sdq : very big device. try to use READ
CAPACITY(16).
Nov 4 10:36:29 terra kernel: SCSI device sdq: 5858973696 512-byte hdwr
sectors (2999795 MB)
Nov 4 10:36:29 terra kernel: sdq: Write Protect is off
Nov 4 10:36:29 terra kernel: SCSI device sdq: drive cache: write back
Nov 4 10:36:29 terra kernel: sdq: unknown partition table
Nov 4 10:36:29 terra kernel: sd 5:0:0:1: Attached scsi disk sdq
Nov 4 10:36:29 terra kernel: sd 5:0:0:1: Attached scsi generic sg16 type 0
Nov 4 10:36:31 terra kernel: sd 5:0:0:1: SCSI error: return code =
0x000b0000
Nov 4 10:36:31 terra kernel: end_request: I/O error, dev sdq, sector
5858973568
Nov 4 10:36:31 terra kernel: printk: 16 messages suppressed.
Nov 4 10:36:31 terra kernel: Buffer I/O error on device sdq, logical
block 732371696
Nov 4 10:36:31 terra kernel: sd 5:0:0:1: SCSI error: return code =
0x000b0000
Nov 4 10:36:31 terra kernel: end_request: I/O error, dev sdq, sector
5858973568
Nov 4 10:36:31 terra kernel: Buffer I/O error on device sdq, logical
block 732371696
Nov 4 10:36:32 terra kernel: sd 5:0:0:1: SCSI error: return code =
0x000b0000
Nov 4 10:36:32 terra kernel: end_request: I/O error, dev sdq, sector
5858973688
...
Nov 4 10:36:33 terra kernel: sd 5:0:0:1: SCSI error: return code =
0x000b0000
Nov 4 10:36:33 terra kernel: end_request: I/O error, dev sdq, sector
5858973688
Nov 4 10:36:33 terra kernel: sd 5:0:0:1: SCSI error: return code =
0x000b0000
Nov 4 10:36:33 terra kernel: end_request: I/O error, dev sdq, sector
5858973688
Nov 4 10:36:33 terra kernel: sd 5:0:0:1: SCSI error: return code =
0x000b0000
Nov 4 10:36:33 terra kernel: end_request: I/O error, dev sdq, sector
5858973568
...
Hi,
I'm just posting the solution to this in case anybody else hits a similar
problem. The errors were caused by a hardware configuration error.
The "Default Transfer Clock" on the raid was set to 80 MHz yet filesystems
bigger than 2 Tb require this to be 160 MHz. Once this was set correctly
everything was fine.
--
Mark Whidby
Infrastructure Coordinator (Unix) - Physics/Chemistry/EAES/Mathematics Team
Information Systems
Faculty of Engineering and Physical Sciences
