Re: 8 milliseconds minimum gap between two consecutive disk I/O

[Andre Hedrick]

Parse out the contents beginning at 82word offset from the beginning of
the 512 sector word

/proc/ide/hda # cat identify
0040 3fff 0000 0010 0000 0000 003f 3031
3138 0000 4134 3041 504e 3843 2020 2020
2020 2020 2020 2020 0003 0200 001d 4741
5335 3431 3132 4d61 7874 6f72 2039 3038
3435 4434 2020 2020 2020 2020 2020 2020
2020 2020 2020 2020 2020 2020 2020 8010
0000 2f00 0000 0200 0200 0007 3fff 0010
003f fc10 00fb 0110 fc10 00fb 0000 0007
0003 0078 0078 0078 0078 0000 0000 0000
0000 0000 0000 0000 0000 0000 0000 0000
001e 0017 7c69 4001 4000 7c69 4001 4000
0407 0000 0000 0000 0000 0000 0000 0000
^^^^
Word88 above.

On Tue, 4 Jan 2000, Brian Hall wrote:

> Is there a utility to tell if a given drive supports those features?
> 
> On 04-Jan-2000 Mark Hahn wrote:
> >> IDE doesn't provide for multiple queued commands, disconnect, reconnect,
> >> etc. If you want this, you use SCSI. IDE is like a big floppy.
> > 
> > interestingly, everything in that statement is wrong.  the current
> > ATA spec *does* provide for command queueing and dis/re-connect.
> > afaik, no OS uses those features yet, and it might be that no disk
> > implements them yet either.  ATA's still 1 or 2 devices/chain, though, 
> > and cable <= 18".
> 
> --
> Brian Hall <[e-mail]>
> http://www.bigfoot.com/~brihall
> Linux Consultant
> 
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Andre Hedrick
The Linux IDE guy