I have **0 pcs server harddisks. Size is varied from *3GB to **0GB.
You can get these harddisks very reasonable prices.
Many ST***6 interface disk drives were only specified by the
manufacturer to run at the 1/3 lower MFM data transfer rate
compared to RLL, while other drive models (usually more expensive
versions of the same drive) were specified to run at the higher RLL
data transfer rate. In some cases, a drive in practice had
sufficient margin to allow the MFM specified model to run at the
faster RLL data transfer rate, although not officially supporting
this mode. Also, any RLL-certified drive could run on any MFM
controller, but with 1/3 less data capacity and as much as 1/3 less
data transfer rate compared to its RLL specifications.