Sirs
I would like to optimise the way that SME server runs the *addin* SCSI hard drives, similar to the way that hdparm has now optimised the booting IDE drive. This drive's throughput was almost doubled (-tT = ~7Mbps) using various switches:-) The IDE drive is quite ordinary. In a similar fashion another SME server elsewhere on the network had its booting IDE drive's throughput raised almost tenfold to ~22Mbps. But SME server can't seem to use my old SCSI drives at anything faster than 1Mbps:-) I realise that the old 1542CF card is pretty darned slow, it's an ISA class one at that, but I'm hardly saturating its 5Mbps natively available bandwidth... :~/
Testing either of the SCSI drives always returns -tT = ~1.1Mbps... despite significant differences in their age and design. Amending various Ctrl-A settings of the ISA SCSI host adapter card does not have any apparent affect. Terminating the SCSI drives on a non-booting but otherwise *faster* host adapter (Adaptec 2904CD PCI) results in figures that are abysmal (-tT = 0.25Mbps).
SME server v5.5 with an IDE booting drive
very old Explorer II mobo (8Gb BIOS limitation)
P166 - 64Mb EDO RAM
two addin SCSI drives (9Gb LVD 7200 and 1Gb 5400)
Adaptec 1542CF (ISA class unfortunately) booting host adapter
Adaptec 2904CD (PCI class but without BIOS)
3c905TX 100Mbps NIC (exact model nbr unrecorded)
3c16464c (intelligent/unmanaged 10/100Mbps) switch
(BTW all segments report back as being 100Mbps)
CAT5 cabling throughout
there two W2kPro-SP2 boxes on the network
and another SME server elsewhere on the network
(higher spec kit, though with no SCSI drives)
A search, run on your forum archives, didn't really assist.
best wishes, Robert
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