I believe it's 528 bytes these days... Depends on the vintage. -Ben ________________________________________ From: cctalk [cctalk-bounces at classiccmp.org] on behalf of supervinx [supervinx at libero.it] Sent: Wednesday, April 13, 2016 8:31 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: R: Re: Getting an ibm as/400 Well... AS/400 scsi drives are recognized by the string IBM AS/400, during the inquiry phase. They can be used in a standard PC, if reformatted at 512 bytes/sector, since OS/400 use 520 bytes/sector. If they come unformatted or degaussed, you can reformat it at 520 under a *nix system with sg_utils (e.g. Linux) and used (I tried it successfully on different AS/400 systems).