Thanks, its finically best for me to either go for the 18 or 32gig drives, so its just the shock and heat I need to be concerned about. I could not find any evidance in the specs that the 32 will run hot, however the shock figures are a minor worry. More interestingly the 32gig drive weights a little more and I wonder how the drive bay mountings would perform in the empeg ?
List of available drives, and links to full specs at http://www.storage.ibm.com/techsup/hddtech/table.htm

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Rod, UK Mk2 18gig Red S/No.341