Messages in this thread | | | Date | Tue, 31 Aug 2004 12:44:08 -0700 | From | "Adrian Yee" <> | Subject | Re: HDD LED doesn't light. |
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> Just an FYI... historically, the LED has been driven in PATA with a > signal known as /DASP, this is an active-low signal called "Drive > Active / Slave Present" and a PATA drive asserts this signal when > processing a command. > > If I understand it right, in SATA, instead of a wire-based protocol, > we have a serialized packet-based protocol, so there was no driving > of > an LED in the initial specification. Revisions to the specification > have since commandeered one of the pins on the power connector for > use > as a /DASP signal to drive an LED. However, to do that you > obviously > can't be using a MOLEX->SATA power adapter, you need a motherboard > that natively supports SATA. The 3112 you mention attempts to be a > native SATA solution, it doesn't act merely as a PATA->SATA > converter. > Therefore, they may not have done the DASP- signal internally.
But this doesn't explain why I have two motherboards here where the HDD activity LED does not light up in linux (for SATA drives) but does in windows . Note that it only starts working in windows *after* the driver has loaded. One is an ASUS A7N8X Deluxe (rev 1.0) and the other an Abit NF7-S (rev 2.0), both with Sil3112 controllers. On the other hand, I have a DFI Ultra Infinity with a Sil3114 whose activity LED works fine in linux.
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