[comp.sys.ibm.pc.hardware] Seek time increased on Rodime RO3000TS with Adaptec 1542B

ps@cc.tut.fi (Pertti Suomela) (04/08/91)

The equipment:
	Northern Star 386SX (16MHz, Award BIOS)
	Rodime RO3000TS drive (210M)
	Adaptec 1542B SCSI adapter
	Trident TVGA 8800 graphics adapter
	MSC Omnimouse, EasyData 2400bps modem

The average seek time on my previous adapter (an ordinary DTC) was
about 12ms which increased to 21ms when I installed the Adaptec 1542B
adapter. The amazing 75% (!) increase cannot be normal or acceptable.
The transfer rate is OK, about 980K/s according to SPINTEST.

BTW, I seem to have now a drive with 64 heads, 32 sectors/track and
199 cylinders (208666624 bytes). Has the conversion of the number of
heads and cylinders anything to do with the problem and is there a way
to configure the conversion scheme?

I have tried to alter various parameters with the SCSICNTL but they
seem to affect neither the conversion nor the seek time.

Any ideas?
-- 
                          Pertti Suomela
                           ps@cc.tut.fi
             Tampere University of Technology, Finland