Re: DMA on Friday night server

Greg Madden wrote:

>On Thursday 07 July 2005 08:04 pm, Damien Hull wrote:
>
>
>>Damien Hull wrote:
>>
>>
>>>I think I have DMA working on the Friday night server.
>>>
>>> hdparm -Tt /dev/hdb
>>>
>>> /dev/hdb:
>>> Timing cached reads: 348 MB in 2.00 seconds = 173.68 MB/sec
>>> Timing buffered disk reads: 64 MB in 3.09 seconds = 20.72
>>>MB/sec [root@testb ~]# hdparm -v /dev/hdb
>>>
>>> /dev/hdb:
>>> multcount = 16 (on)
>>> IO_support = 0 (default 16-bit)
>>> unmaskirq = 0 (off)
>>> using_dma = 1 (on)
>>> keepsettings = 0 (off)
>>> readonly = 0 (off)
>>> readahead = 256 (on)
>>> geometry = 65535/16/63, sectors = 81964302336, start = 0
>>> [root@testb ~]#
>>>
>>>"hdb" is where all the data is.
>>>
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>>>
>>Here's more info.
>>
>> hdparm -i /dev/hdb
>>
>> /dev/hdb:
>>
>> Model=Maxtor 6Y080L0, FwRev=YAR41BW0, SerialNo=Y2MP82KE
>> Config={ Fixed }
>> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
>> BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16,
>>MultSect=16 CurCHS=16383/16/63, CurSects=16514064, LBA=yes,
>>LBAsects=160086528 IORDY=on/off, tPIO={min:120,w/IORDY:120},
>>tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4
>> DMA modes: mdma0 mdma1 mdma2
>> UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 udma6
>> AdvancedPM=yes: disabled (255) WriteCache=enabled
>> Drive conforms to: (null):
>>
>> * signifies the current active mode
>>
>> [root@testb ~]# hdparm -i /dev/hda
>>
>> /dev/hda:
>>
>> Model=Maxtor 83240D3, FwRev=NAVX171F, SerialNo=L326XNPA
>> Config={ Fixed }
>> RawCHS=6697/15/63, TrkSize=0, SectSize=0, ECCbytes=20
>> BuffType=DualPortCache, BuffSize=256kB, MaxMultSect=16,
>>MultSect=16 CurCHS=6697/15/63, CurSects=6328665, LBA=yes,
>>LBAsects=6329388 IORDY=on/off,
>>
>>
>tPIO={min:120,w/IORDY:120},http://www.pcguide.com/ref/hdd/if/ide/modesUDMA-c.html
>
>
>>tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4
>> DMA modes: mdma0 mdma1 mdma2
>> UDMA modes: udma0 udma1 *udma2
>> AdvancedPM=no WriteCache=enabled
>> Drive conforms to: ATA/ATAPI-4 X3T13 1153D revision 7: 1 2 3
>>
>> * signifies the current active mode
>>
>>
>>If anyone thinks I need to make changes let me know.
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>>
>>
>
>http://www.pcguide.com/ref/hdd/if/ide/modesUDMA-c.html
>
>The good news is that DMA is working, the not so good news is it is
>operating in UDMA mode 2, 33MB/S, which is slow but depending on the
>age of the box may be all it is capable of. Any hd faster than UDMA
>mode 2 will require a 80 pin cable.
>
>
>
The 80 pin cable is not in the box but I can add one. Before I install
it I'll check to see if this box can do more then UDMA mode 2.

I just installed a USB 2.0 and Firewire combo card. I'm about to take it
out for a spin. I'll let you know how she handles.
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Received on Thu Jul 7 21:32:32 2005