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From: "Graham Bentley" <gbentley@uk2.net>
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Date: Sun, 12 Mar 2006 19:50:38 -0000
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Subject: Anyone seen this scsi error before ?
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Recently swapped out my Sony for a HP DAT and
got this first time in dmesg

(sa0:ahc0:0:6:0): PREVENT ALLOW MEDIUM REMOVAL. CDB: 1e 0 0 0 0 0 
(sa0:ahc0:0:6:0): CAM Status: SCSI Status Error
(sa0:ahc0:0:6:0): SCSI Status: Check Condition
(sa0:ahc0:0:6:0): UNIT ATTENTION asc:28,0
(sa0:ahc0:0:6:0): Not ready to ready change, medium may have changed
(sa0:ahc0:0:6:0): Unretryable error

Anyone shed any light upon it ?