Ivan Gyurdiev wrote:
Well, I think this is a SATA drive..
WDC WD2000JS-55MHB0
Yes, some SATA drives, are re-designed from the PATA drives,
incorporating a SATA/PATA bridge on the drive, I think yours is similar
to mine, with native SATA
Of course you can also buy external SATA/PATA convertors, but I wasn't
expecting you to be using one of those.
It's nice to know my SATA II drive is so much superior :)
If the rpm, number of platters, and data encoding stay the same, so will
the performance, broadly speaking, 8MB or 16MB of cache will only have
an effect if you're doing reading that fits a certain pattern, and as
we've seen the physical disk couldn't even half fill an ATA133 interface
(let alone SATA, or SATA II) only cache reads can do that.
How does NCQ make a difference?
It lets the o/s make several read requests to the drive in parallel,
then the drive re-orders them according to where it *know* the physical
heads are to minimize seek time, and maximize throughput. like SCSI has
done for a long time.
Remember they head/cylinder/sector numbers you see from SATA/PATA disks
are basically *lies* with LBA so the o/s can't know this.
Also, jgarzik's webpage says: "Nvidia has released docs on nforce4 under
NDA".
Do you know if there's work in progress to implement NCQ for that chipset?
Sorry I don't have (or know about) nForce chipset, my Intel mobo
supports SATA II's 3Gb/s speed, but not the NCQ.
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