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External
Since: Oct 14, 2009
Posts: 2
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(Msg. 1) Posted: Wed Oct 14, 2009 12:25 pm
Post subject: sata_sil and UDMA 6
Imported from groups: comp>os>linux>hardware (more info?)
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External
Since: Nov 06, 2006
Posts: 76
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(Msg. 2) Posted: Wed Oct 14, 2009 12:25 pm
Post subject: Re: sata_sil and UDMA 6 [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Hello,
Hans-Joachim Zierke a écrit :
> My SATA drive supports UDMA 6 and is recognized by the controller as
> UDMA 6 during boot. (The controller can do 150).
> <...>
> [ 2.208076] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
> [ 2.216636] ata1.00: ATA-8: WDC WD10EADS-00M2B0, 01.00A01, max UDMA/133
> [ 2.219357] ata1.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 0/32)
> [ 2.230730] ata1.00: configured for UDMA/100
> <...>
> Question: The current drive is slower than UDMA/100 anyway, so it doesn't
> hurt at the moment. Will this change, if ata2 gets a faster drive?
Question : the UDMA mode defines signal timings for the parallel
transport (PATA), so does it actually matter for serial transport (SATA)
devices or is it just for software compatibility and ignored ? |
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External
Since: Oct 14, 2009
Posts: 2
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(Msg. 3) Posted: Sat Oct 24, 2009 6:25 pm
Post subject: Re: sata_sil and UDMA 6 [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
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External
Since: Nov 06, 2006
Posts: 76
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(Msg. 4) Posted: Sun Oct 25, 2009 11:25 am
Post subject: Re: sata_sil and UDMA 6 [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Hans-Joachim Zierke a écrit :
> Pascal Hambourg schrieb:
>
>>> Question: The current drive is slower than UDMA/100 anyway, so it doesn't
>>> hurt at the moment. Will this change, if ata2 gets a faster drive?
>> Question : the UDMA mode defines signal timings for the parallel
>> transport (PATA), so does it actually matter for serial transport (SATA)
>> devices or is it just for software compatibility and ignored ?
>
> If it's a fake for software compatibility, it certainly won't get reported
> to human readers.
The software doesn't know it's fake, and reports it to human readers.
Have you tested the sustained throughput in different UDMA modes ? If it
does not change, and more importantly, if it is higher that the
specified maximum throughput for a given mode (e.g. > 33 MB/s in UDMA
mode 2), then it's obviously fake. |
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