cg@myrias.UUCP (Chris Gray) (11/11/88)
The company I work for is trying out some CDC SCSI drives for use with Sun 3/50 workstations. When a bunch arrived last week, I was able to borrow one for a tryout. After finding a SCSI cable that works (borrowed from a friend's TRS-80 model 16), I hooked it up to the 2090 in my Amiga 2000 (I had to use the connector for internal SCSI drives, and run the cable out through a back cutout to the drive box). I cooked up a pair of MountList entries for it (one for RES2:, one for Big:, which is an FFS partition of the rest of the disk, except for a 2 cylinder dh2:), and fired it up. The documentation with it said that it was already formatted with 512 byte sectors for Sun UNIX, so I figured I'd try a "format quick", to avoid the long wait. Asside from the 'prep' taking over 10 minutes (peculiar, since it didn't seem to be doing and disk I/O during that time), everything worked perfectly. Unfortunately, I don't seem to have 'diskperf' anywhere, so I can't do accurate measurements on the drive, but it seems to be about the same speed as my internal ST506 20 Meg drive, which is also FFS. The only problems I have are that the drive is too big (as deep as the 2000, almost as high, and 8" wide), and FAR too noisy - it sounds very similar to the LearJet in FS-II! In summary: great job Commodore! - totally unknown hard disk from unpacking to full operation in 20 minutes! Here's the technical details: Control Data full height 5-1/4" SCSI 150 Meg drive (Wren III ?) 961 cylinders, 9 heads, 35 sectors per track, interleave 1 and here's my MountList entries: /* * Reserved tracks for SCSI disk. */ RES2: Device = hddisk.device Unit = 3 Flags = 0 Surfaces = 9 BlocksPerTrack = 35 Reserved = 2 Interleave = 1 LowCyl = 0 ; HighCyl = 1 Buffers = 1 BufMemType = 0 # /* * The remainder (except for dh2:) of the hard disk. */ Big: Device = hddisk.device Unit = 3 Flags = 0 Surfaces = 9 BlocksPerTrack = 35 Reserved = 2 Interleave = 1 LowCyl = 4 ; HighCyl = 960 Buffers = 50 BufMemType = 0 GlobVec = 1 FileSystem = L:FastFileSystem DosType = 0x444F5301 # Now if I could only figure out a way for the company to "forget" that I still have the drive! -- Chris Gray Myrias Research, Edmonton +1 403 428 1616 {uunet!mnetor,ubc-vision,watmath,vax135}!alberta!myrias!cg