On 06/12/15 20:57, Oliver Lehmann wrote: > Right after power up and after the disk got ready, I issue the IDENTIFY > command and read the data back which works perfectly. After that I > read sector 0 and this fails. I thought the first valid sector on an IDE disk was sector 1, CHS 0:0:1? -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/