[PVE-User] Critical medium error

[Emmanuel Kasper]

On 12/07/2016 05:03 PM, Gilberto Nunes wrote:
> Hi list
> 
> I get this issue from an external USB hard disk:
> 
> raps: atop[87646] trap divide error ip:40780a sp:7fff3074a928 error:0 in
> atop[400000+26000]
> [8244487.641127] sd 988:0:0:0: [sdf] tag#0 FAILED Result: hostbyte=DID_OK
> driverbyte=DRIVER_SENSE
> [8244487.641130] sd 988:0:0:0: [sdf] tag#0 Sense Key : Medium Error
> [current]
> [8244487.641132] sd 988:0:0:0: [sdf] tag#0 Add. Sense: Unrecovered read
> error
> [8244487.641135] sd 988:0:0:0: [sdf] tag#0 CDB: Read(16) 88 00 00 00 00 00
> 58 06 50 a0 00 00 00 20 00 00
> [8244487.641136] blk_update_request: critical medium error, dev sdf, sector
> 1476808864
> [8244518.664247] usb 2-1.2: reset high-speed USB device number 102 using
> ehci-pci
> [8260518.890913] sd 988:0:0:0: [sdf] Very big device. Trying to use READ
> CAPACITY(16).
> 
> 
> As consequence I get a extremely  slow vm access.
> 
> So I detect that this External Driver has some problem. After disconnect
> this External Driver, everything is go smoothly...

Most probably the hard drive or the cable is dead.
All processes trying to access the device will hang waiting for I/O, so
yes it will slow down the whole system ...
Emmanuel