[ale] Re: [ale] boot parms ide=???

[Geoffrey]

SuSE 8.1 has hdparm calls in /etc/init.d/boot.idedma (which does only 
address the dma flag..)

Michael D. Hirsch wrote:
> Excellent write-up, Marvin.  My one comment is that in RedHat, and 
> presumably other distributions, too, putting these commands in 
> /etc/rc.d/rc.local is not the right place.
> 
> RedHat has /etc/sysconfig/harddisks.  It is well commented.  You basically 
> figure out your hdparm settings and add them to that file.  They get fed 
> to hdparm via some script fu at startup.
> 
> Michael
> 
> On Wednesday 19 February 2003 03:19 am, Marvin Dickens wrote:
> 
>>The way I understand it is that ATA drives currently support 4 modes of
>>operation. They are:
>>
>>PIO (0-4 submodes)
>>Single-word DMA (0-2 submodes)
>>Multi-word DMA (0-2 submodes)
>>Ultra DMA (0-7 submodes)
>>
>>Therefore, using this information, you can use the hdparm utility to
>>configure the drive like so:
>>
>>hdparm -X00 -> restore default PIO mode
>> hdparm -X01 -> disable IORDY
>>
>>PIO modes (Programmed IO) (disk mode (above) + 8)
>> hdparm -X08 -> PIO 0
>> hdparm -X09 -> PIO 1
>> hdparm -X10 -> PIO 2
>> hdparm -X11 -> PIO 3
>> hdparm -X12 -> PIO 4
>>
>>SDMA modes (Single-word DMA) (disk mode (above) + 16)
>> hdparm -X16 -> SDMA 0
>> hdparm -X17 -> SDMA 1
>> hdparm -X18 -> SDMA 2
>>
>>MDMA modes (Multi-word DMA) (disk mode (above) + 32)
>> hdparm -X32 -> MDMA 0
>> hdparm -X33 -> MDMA 1
>> hdparm -X34 -> MDMA 2
>>
>>UDMA modes (Ultra-DMA) (disk mode (abov) + 64)
>> hdparm -X64 -> UDMA 0 (ATA16)
>> hdparm -X65 -> UDMA 1 (ATA 25)
>> hdparm -X66 -> UDMA 2 (ATA 33)
>> hdparm -X67 -> UDMA 3 (ATA 44)
>> hdparm -X68 -> UDMA 4 (ATA 66)
>> hdparm -X69 -> UDMA 5 (ATA 100)
>>
>>An example of how you can use the above information:
>>
>>Determine how fast your drive(s) are running. To do this run the
>>following command:
>>
>>hdparm -Tt /dev/hda
>>
>>Next, find out which settings are currently enabled:
>>
>>hdparm -c -d /dev/hda
>>
>>You'll be able to tell whether 32 bit dma is enabled, if multicount is
>>used, and unmasked irq's. A catchall command to enable some or all
>>features that you would wantis:
>>
>>hdparm -c1 -m16 -d1 /dev/hda
>>
>>This enables 32bit access and multisector reads. These items may already
>>be present in a compiled kernel. It depends on distro.
>>
>>To push further do the following:
>>
>>hdparm -c1 -u1 -m16 -d1 -X66 /dev/hda
>>
>>
>>This enables unmasked irq's and Ultradma mode 2. They should work well
>>but may cause problems on older drives. The udma setting won't work on
>>motherboards (eg) lacking a udma66 (or newer) controller. If these
>>settings improve your system, you can add the above command(s) to
>>/etc/rc.local to be active at bootup. You can also find out more about
>>your ide chipset by exploring /proc/ide
>>
>>
>>I hope this helps.
>>
>>Best
>>
>>Marvin Dickens
>>_______________________________________________
>>Ale mailing list
>>Ale at ale.org
>>http://www.ale.org/mailman/listinfo/ale
> 
> 
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> 
> 

-- 
Until later: Geoffrey		esoteric at 3times25.net

The latest, most widespread virus?  Microsoft end user agreement.
Think about it...

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