<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I've been loosely following this, not reading all the details, so<br>forgive me if I'm repeating or stating the obvious...
<br><br>Have you checked your BIOS settings to make sure access to these IDE<br>devices is UDMA mode, not PIO? Are the IDE cables you're using the<br>older 40-wire style or the newer 80-wire? See<br><a href="http://www.pcguide.com/ref/hdd/if/ide/confCable80-c.html">
http://www.pcguide.com/ref/hdd/if/ide/confCable80-c.html</a> for info on<br>the difference.<br></blockquote></div><br>hdparm -i /dev/hda <br><br>will answer this question. Here is an example of a 3 year old 40 gb ide drive on my dual processor opteron 850
<br><br># hdparm -i /dev/hda<br><br>/dev/hda:<br><br> Model=WDC WD400JB-00ENA0, FwRev=05.03E05, SerialNo=WD-WCAD18755665<br> Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }<br> RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
<br> BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=off<br> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78165360<br> IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}<br> PIO modes: pio0 pio1 pio2 pio3 pio4
<br> DMA modes: mdma0 mdma1 mdma2<br> UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5<br> AdvancedPM=no WriteCache=enabled<br> Drive conforms to: Unspecified: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5
<br><br> * signifies the current active mode<br><br>And here is the benchmark.<br># hdparm -tT /dev/hda<br><br>/dev/hda:<br> Timing cached reads: 3420 MB in 2.00 seconds = 1710.47 MB/sec<br> Timing buffered disk reads: 140 MB in
3.01 seconds = 46.47 MB/sec<br><br>Now compare that to a 6 month old sata2 disk:<br> # hdparm -tT /dev/sda<br><br>/dev/sda:<br> Timing cached reads: 3008 MB in 2.00 seconds = 1504.51 MB/sec<br> Timing buffered disk reads: 230 MB in
3.02 seconds = 76.15 MB/sec<br><br><br>John