[arch-general] Problem with hard disk - not arch related

[Dario]

Ciao!

This is unrelated to arch, but I wanted to tell this to the list because maybe 
someone has a clue.

I have recently bought and installed a new sata hard disk. It has a couple of 
partitions, one with XFS which I use as storage.
It generally works fine, but sometimes something happens and it cease to work. 
I don't know if it's the disc's fault, because at the next restart the 
problems are gone. It seems that the controller sometimes gets lost. Dmesg 
says this:

ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6                                                                                                    
ata4.00: BMDMA stat 0x25                                                                                                                                     
ata4.00: cmd 35/00:20:e7:a0:f1/00:01:04:00:00/e0 tag 0 dma 147456 out                                                                                        
         res 51/84:11:e7:a0:f1/84:00:00:00:00/e0 Emask 0x10 (ATA bus error)                                                                                  
ata4.00: status: { DRDY ERR }                                                                                                                                
ata4.00: error: { ICRC ABRT }                                                                                                                                
ata4: soft resetting link                                                                                                                                    
ata4.00: configured for UDMA/133                                                                                                                             
ata4: EH complete
...
(repeat some time)
....

ata4.00: qc timeout (cmd 0x27)                                                                                                                               
ata4.00: failed to read native max address (err_mask=0x4)                                                                                                    
ata4.00: HPA support seems broken, skipping HPA handling                                                                                                     
ata4.00: revalidation failed (errno=-5)                                                                                                                      
ata4: link is slow to respond, please be patient (ready=0)                                                                                                   
ata4: soft resetting link
ata4: SRST failed (errno=-16)                                                                                                                                
ata4: reset failed, giving up                                                                                                                                
ata4: EH complete
...
sd 3:0:0:0: [sdc] Unhandled error code                                                                                                                       
sd 3:0:0:0: [sdc] Result: hostbyte=0x04 driverbyte=0x00                                                                                                      
end_request: I/O error, dev sdc, sector 82953831
...
I/O error in filesystem ("sdc2") meta-data dev sdc2 block 0x104d6d83       
("xlog_iodone") error 5 buf count 6656                                            
xfs_force_shutdown(sdc2,0x2) called from line 1043 of file fs/xfs/xfs_log.c.  
Return address = 0xf9c8d923                                                    
Filesystem "sdc2": Log I/O Error Detected.  Shutting down filesystem: sdc2                                                                                   
Please umount the filesystem, and rectify the problem(s)                                                                                                     
...
Buffer I/O error on device sdc2, logical block 603726
lost page write due to I/O error on sdc2

So, what should I look for? Together with the disk, I installed an Nvidia 9800 
GT, which could also be the culprit, because maybe I haven't a proper power 
unit etc. - or not?

Thanks in advance to everybody!

Ciao a tutti

Dario
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