Hello.
Justin Piszcz wrote:
Do some chipsets (SiI 3132 vs. Intel ICH9) run certain drives at
UDMA/100 vs. UDMA/133?
Intel ICH chipsets never supported UDMA/133.
I have several 750GB WD drives (exact make/model) and the ones on the
intel chipset show up as:
[ 1.407321] ata3.00: ATA-7: WDC WD7500AAKS-00RBA0, 30.04G30, max
UDMA/133
[ 1.407409] ata3.00: 1465149168 sectors, multi 0: LBA48 NCQ (depth
31/32)
[ 1.408300] ata3.00: configured for UDMA/133
I'm *very* surprised to see that on ICH9. Oh wait, that's SATA
controller, not PATA! Then I don't know...
The ones on the SiI 3132 chipset show up as:
[ 9.604413] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
[ 9.619024] ata11.00: ATA-7: WDC WD7500AAKS-00RBA0, 30.04G30, max
UDMA/133
[ 9.619111] ata11.00: 1465149168 sectors, multi 16: LBA48 NCQ
(depth 31/32)
[ 9.620029] ata11.00: configured for UDMA/100
If they are both 3.0 Gbps, are they both the same speed even though
one is configured for a slower speed than the other?
I'd think so.
Or is it the case that the SiI 3132 does not support AHCI and that is
the reason for the difference? Does it make any difference in
performance?
Hardly -- if these are true SATA controllers.
MBR, Sergei
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