NASLite Network Attached Storage

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 Post subject: PIO or DMA?
PostPosted: Sat Feb 17, 2007 4:23 am 
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Joined: Sat Feb 17, 2007 4:03 am
Posts: 2
Just dove into NASLite, so easy to set up my mom might be able to do it.

Anyway,
I am attempting to find a solution to slow transfer speeds. Using diskwriggler I'm only getting 1.4MB/s on a 100mbit network.

I currently only have one 250gb hard drive attached. I believe the problem might be the drive running in PIO mode instead of DMA but I am unsure on how to find this out.

What I can find in the logs are the following:
Quote:
Feb 17 07:30:38 Aptiva user.info klogd: Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4
Feb 17 07:30:38 Aptiva user.info klogd: ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
Feb 17 07:30:38 Aptiva user.warn klogd: hda: WDC WD2500JB-57REA0, ATA DISK drive
Feb 17 07:30:38 Aptiva user.warn klogd: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Feb 17 07:30:38 Aptiva user.warn klogd: hda: attached ide-disk driver.
Feb 17 07:30:38 Aptiva user.warn klogd: hda: host protected area => 1
Feb 17 07:30:38 Aptiva user.info klogd: hda: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63


and the S.M.A.R.T. information gives the following:
Quote:
ATA Version is: 7
ATA Standard is: Unrecognized. Minor revision code: 0x00
SMART support is: Available - device has SMART capability.
SMART support is: Enabled


So for some reason it is displaying the ATA Standard of "Unrecognized" instead of 7, 6, ect...

Does this mean it is being run in PIO mode?

If so, is there a way to fix this? I fear the worst since the bios of this computer does not support drives larger than 137gb and no bios update is avaliable. Due to this I bypassed drive detection and set it to none. Does this mean I will be stuck in PIO mode since I cannot force the drive into DMA mode through the bios?


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 Post subject:
PostPosted: Sat Feb 17, 2007 2:26 pm 
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Joined: Sat Feb 17, 2007 4:03 am
Posts: 2
I discovered by reading in the hard drive manual an undocumented (on the drive that is) jumper setting for legacy mode. This allowed the drive to be detected by the bios. I now get transfer speeds averaging around 4MB/s -5MB/s, which is acceptable to me.

My theory of the drive running in PIO mode appears to be correct.

So anyone else, feel free to answer this for future reference for others.


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 Post subject:
PostPosted: Mon Mar 05, 2007 8:50 am 
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Joined: Mon Mar 05, 2007 8:43 am
Posts: 3
Location: sudbury, ont.
i have the same issue with 3 of 4 hdds in my nas box. the one that is detecting as udma is going fast.


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