SCSI Hard drive "MEDIUM ERROR"

[Dan Nelson]

In the last episode (Nov 22), Ryan J. Cavicchioni said:
(top-posting fixed)
> Dan Nelson wrote:
> >In the last episode (Nov 22), Ryan J. Cavicchioni said:
> >>What would this mean? I get it during heavy FTP transfers on a drive
> >>that is 75% full.
> >>
> >>(da1:ahc0:0:8:0): MEDIUM ERROR info:381b12 csi:ff,ff,ff,ff asc:11,1
> >>(da1:ahc0:0:8:0): Read retries exhausted actual retry count: 104
> >>(da1:ahc0:0:8:0): Retrying Command (per Sense Data)
> >>(da1:ahc0:0:8:0): READ(10). CDB: 28 0 0 38 1a a0 0 0 80 0
> >>(da1:ahc0:0:8:0): CAM Status: SCSI Status Error
> >>(da1:ahc0:0:8:0): SCSI Status: Check Condition
> >
> >A medium error is a physical media error.  The drive tried reading a
> >sector 104 times and couldn't recover the data.  If you have AWRE
> >enabled, writing to that disk block should cause the drive to mark
> >it bad and use a spare sector.  "camcontrol modepage da1 -m 1 -e -P
> >3" will let you turn it on.  Enabling ARRE is a good idea too (if
> >the drive detects a bad sector but recovered it, it will reallocate
> >the block).
>
> Would the excesive FTP load cause this? I was downloading mp3's over
> LAN so I was getting 7 mbit speed. Would this cause the disks to do
> this?

No; chances are there's just a bad spot on your disk that wasn't
touched before.  The block number (the info: number) shouldn't change
(or if it's a large bad spot, it may vary by a digit or two).

-- 
	Dan Nelson
	dnelson at allantgroup.com