CompuServe Messages

#SCSI confusion…

    19-Jun-93 23:35:28
Sb: #104107-#SCSI confusion…
Fm: Don Curtis/SYSOP 76703,4321
To: Paul Higginbottom 74140,250
Paul, Sorry….there is no consumer drive on the market that can sustain rates of 5MB/sec. Do the math. 3600rpm = 60 revs per second. Even at 35 sectors per track, you can only read 35 x 60 sectors per second and at 512 bytes per sector…that equals 35 x 60 x 512 or 1,075,200 bytes per second. You'd have to have 5 times the number of sectors per track, 5 times the rotational speed or be able to read 5 tracks at one time in order to get 5 Meg/second off of the media. Burst mode, with buffered reads and/or buffered read-ahead and you can do it…but sustained…not physically possible out of consumer drives. Stripped disk arrays…yes, single drive…no. Don