Imaging SCSI hard disks

Jerome Fine replies: Normally, I find it a bit inconvenient to use a hard disk to copy stuff back and forth from RT-11 running under E11 on a Pentium and a real DEC PDP-11. If someone is trying to do this and is having problems, I will suggest how I solved the problem. For myself, while I have used a hard SCSI disk drive to be sure it is possible, I find the use of magneto optical media a bit more convenient. Since the media is removable, the PC does not complain when I boot that the media is not in the drive. Then under E11, I am able to: MOUNT DU0: SCSI0: Of course, on a real DEC PDP-11, I must use a SCSI host adapter. I have a CQD 220/TM which does the job along with an Adaptec AHA2940-AU on the PC. A Sony SMO S-501 drive on each system completes the needed hardware to allow me to transfer 300 MBytes back an forth. I also use the MO media as a backup for the 600 MByte ESDI hard drives (Hitachi DK515-78) on the real DEC PDP-11. Since each ESDI hard drive has 20 RT-11 partitions, I use both sides of each MO media PLUS 4 RT-11 partitions from another media. It required very careful co-ordination, but is MUCH better than a tape since any small changes can be made on the MO media to keep the backup up to date. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.