Hi Everyone,
I've been having an issue for a month or so now that I seem unable to track down.
I have an external USB drive for backup. When I start copying from the computer to the external disk, it starts to fail sooner or later. Whether at a large file or after several small ones, but it fails dropping messages like this (taken from dmesg):
sd 7:0:0:0: timing out command, waited 180s
sd 7:0:0:0: [sda] Unhandled sense code
sd 7:0:0:0: [sda] Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE
sd 7:0:0:0: [sda] Sense Key : Hardware Error [current]
sd 7:0:0:0: [sda] Add. Sense: No additional sense information
sd 7:0:0:0: [sda] CDB: Write(10): 2a 00 16 04 5a 40 00 00 f0 00
__ratelimit: 20 callbacks suppressed
Buffer I/O error on device sda1, logical block 46172744
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172745
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172746
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172747
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172748
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172749
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172750
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172751
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172752
lost page write due to I/O error on sda1
Buffer I/O error on device sda1, logical block 46172753
lost page write due to I/O error on sda1
I tested the disk on 2 different computers (one of them is brand new server, the other is old one serving for years) in 3 different USB covers (they're new ones too) with 2 different brand new disks. The disks are 2 TB in size (a bit less actually, around 1.8 TB formatted).
So I tested it with several new hardware changing everything except the operating system, which is SL 6.5 x64. The thing is, it was working with the same disk, same USB cover and same server for years with Debian 6 x64 system. All I can think of now that this must be related to the operating system.
Did anyone happen to experience similar issues? I'd appreciate any help.
BTW, could the kernel parameter "iommu=soft" help in any of this? Found a similar topic but that was about flash drives.
Thanks,
Andras
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