along similar lines to this thought, it could be an issue similar to that with 1581 disks, but more correctly: the issue is magnetic flux density, etc. or even more correctly "oersted of magnetic coercivity". lower density disks have lower values, and higher density disks higher values. I don't specifically know anything about the 8280, but the ability to write is heirachial: if it is SD (single density) then only SD disk will do. if it is DD, then SD or DD disks will work, but the SD disks may not be readable in another SD only drive, etc for HD.... You can tell if its SS or DS by checking the heads, but at worst case you'll only have a half formated disk.... (did the 8inch disk you have say "SSSD of DSDD, ... if they are pre-formatted and of higher density than the drive you may not generate the "oerstads" to overwrite By the way: 1581 are spec'ed as DD, some will read/write HD, but these are probably drives on the fringe of production tolerances.... - Nick > -----Original Message----- > From: Howard Herman [SMTP:hlh@panix.com] > Sent: Friday, 27 August 1999 2:48 > To: cbm-hackers@dot.tcm.hut.fi > Subject: Re: CBM 8280 > > Bo Zimmerman wrote: > > > > I opened the pack of > > 3M SS DD 8" disks I got off eBay and tried to format one. > ^^ > > Taking a guess, and this is only a guess, its the DD that's the prob. > > I suspect that DD didn't appear until much later. In other words, the > drive probably wants SD disks. > > If my guess is correct, this would not be unlike the prob with the 1581 > drive, and trying to use HD disks, instead of DD. > -- > ___ ___ ___ ___ ___ > / //_/ // / // / //_/ // > Howard Herman / ___ // / //___ / ___ // > hlh@panix.com /_// /_// /_____// /_// /_// > - > This message was sent through the cbm-hackers mailing list. > To unsubscribe: echo unsubscribe | mail > cbm-hackers-request@dot.tcm.hut.fi. ------------------------------------------------------------------------------------------------ PLEASE TAKE NOTE: The contents of this email (including any attachments) may be privileged and confidential. Any unauthorised use of the contents is expressly prohibited. If you have received this email in error, please advise us immediately (you can contact us by telephone on +61 8 9441 2311 by reverse charge) and then permanently delete this email together with any attachments. We appreciate your cooperation. Whilst Orbital endeavours to take reasonable care to ensure that this email and any attachments are free from viruses or other defects, Orbital does not represent or warrant that such are free from computer viruses or other defects. (C) 1999: Orbital Engine Company (Australia) Pty Ltd and its affiliates - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
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