Message-Id: <OF42148B74.22345100-ON802569BC.00459B44@raytheon.co.uk> From: Chris.Smith@raytheon.co.uk Date: Thu, 21 Dec 2000 13:00:43 +0000 Subject: [SLE] UDMA controller questions...yet again... (addendum) Hi, A little addendum for my last question. Excuse the FreeBSD references - this is just to illustrate my point in a little more detail for the uneducated. I am not trying to flame or Troll, just to compare the verbosity of the ATA controller outputs of Linux and FreeBSD. FreeBSD is far easier to debug and get performance info from, but the graphics hardware support sucks compared to Linux (which is why I use Linux most of the time as I rather like Unreal Tournament).

From the FreeBSD 4.2 manpage ata(4) - supported devices:-

Intel ICH0 Ultra DMA 33 (UDMA2), 33 MB/sec Intel ICH Ultra DMA 66 (UDMA4), 66 MB/sec Intel ICH2 Ultra DMA 100 (UDMA5), 100 MB/sec

From the FreeBSD 4.2 Release notes:-

The ata(4) driver now has support for ATA100 controllers. [4.1.1] The ata(4) driver now has support for tagged queueing, which is enabled by the ATA_ENABLE_TAGS option. It also supports the ServerWorks ROSB4 ATA33 chipset, the CMD 648 ATA66 and CMD 649 ATA100 chipsets, and the Cyrix 5530. It also has support for ATA "pseudo" RAID controllers, including the Promise Fasttrak and HighPoint HPT370 controllers. Example dmesg (not my system):- ------------------------------- ad0: 3093MB <FUJITSU MPB3032ATU> [6704/15/63] at ata0-master using UDMA33 ad1: 1040MB <M1614TA> [2114/16/63] at ata0-slave using WDMA2 acd0: CDROM <BCD-24X 1997-06-27> at ata1-master using WDMA2 This for example (if I was near my system), would look like:- ad0: 30700MB <IBM DLTA-307030> [x/y/z] at ata0-master using UDMA100 ad1: 30700MB <IBM DLTA-307030> [x/y/z] at ata1-master using UDMA100 etc... I cant get a reliable source of these *simple* bits of information for SuSE7 and/or *any* linux distro. This is not aimed directly at SuSE BTW - just Linux in general. Does anyone keep track of any of this - I just want to know a simple thing such as my current transfer mode... Note: Please feel free to beat me with a stick repetitively if I have missed something very simple... - Chris.