New HDD (was RE: PROMISE Ultra133 TX2 (PDC20269))

New HDD (was RE: PROMISE Ultra133 TX2 (PDC20269))

[Enrico Bartky]

Now I have attached a 80 GB UDMA5 Disk. The hdparm putput says the right UDMA Mode (5). But the hdparm test, I run it 3 times, says 27 MByte/s!? Is that normal, or is my motherboard ( Gigabyte GA-5AA ) to old ( PCI Bus = 33 MHz ). In the manuel from promise there is it described that 33 MHz have bandwith of 133 MByte/s and with 66 MHz 266 MByte/s.

Can you help me, how can I get more transfer rates?

Thanx, EnricoB
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Re: New HDD (was RE: PROMISE Ultra133 TX2 (PDC20269))

[Joel Jaeggli]

On Sat, 13 Nov 2004, Enrico Bartky wrote:

> Now I have attached a 80 GB UDMA5 Disk. The hdparm putput says the right 
> UDMA Mode (5). But the hdparm test, I run it 3 times, says 27 MByte/s!? 
> Is that normal, or is my motherboard ( Gigabyte GA-5AA ) to old ( PCI 
> Bus = 33 MHz ). In the manuel from promise there is it described that 33 
> MHz have bandwith of 133 MByte/s and with 66 MHz 266 MByte/s.

27MB/s is reasonable for a 7200rpm ide disk that isn't totaly state of the 
art (ie 100GB per platter or something). what were you expecting? That's a 
pentium era mainboard is it not?

a similar disk (40GB single platter wester digital 7200rpm) in and amd 64 
box I have is:

[root@twin joelja]# hdparm -t /dev/hda

/dev/hda:
  Timing buffered disk reads:  102 MB in  3.05 seconds =  33.43 MB/sec

the sata 80GB per platter disk in the same box is:

[root@twin joelja]# hdparm -t /dev/sda1

/dev/sda1:
  Timing buffered disk reads:  150 MB in  3.02 seconds =  49.71 MB/sec


> Can you help me, how can I get more transfer rates?
>
> Thanx, EnricoB
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Joel Jaeggli  	       Unix Consulting 	       joelja@darkwing.uoregon.edu 
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Re: New HDD (was RE: PROMISE Ultra133 TX2 (PDC20269))

[Con Kolivas]

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Enrico Bartky wrote:
> Now I have attached a 80 GB UDMA5 Disk. The hdparm putput says the right UDMA Mode (5). But the hdparm test, I run it 3 times, says 27 MByte/s!? Is that normal, or is my motherboard ( Gigabyte GA-5AA ) to old ( PCI Bus = 33 MHz ). In the manuel from promise there is it described that 33 MHz have bandwith of 133 MByte/s and with 66 MHz 266 MByte/s.
> 
> Can you help me, how can I get more transfer rates?

133 is the speed it can transfer the data over the wire. It does _not_ 
mean the speed the hard disk is capable of.

Cheers,
Con

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