| From: | Don Cox |
| Date: | 13 May 2000 at 10:01:00 |
| Subject: | Re: max transfer |
On 13-May-00, leond wrote:
>> All SCSI's can be set to: 0xffffff (zero-x-6 f's)
>> SCSI drives configured in 32 bit space can be
>> nearly anything, use the HDToolbox default value.
Actually, Marc Albrecht disputes this. There are issues with DMA slots,
I think, on some controllers. However, on SCSI a wrong setting just
affects read/write speeds (crucial for audio work), it doesn't give
corrupt files as on IDE.
>> Either way, it makes no relevant difference to speed,
>> if you want it to go faster, use a FFS blocksize of 1024
>> use more buffers & get a modern (fast) drive...
I find 1024 is a good size for a partition containing lots of small
files, but a bigger size (16k) gives noticeably faster response on a
partition used for big audio files. Changing the block size requires
reformatting the partition, so all data must be backed up and restored.
It won't affect other partitions on the same drive.
> Could you please address whether adjusting the Maximum Transfer, via
> HDToolBox, on a drive already in use is safe. I assume that this can
> be done without wiping out any data but I would like you, or someone
> else, to explicitly say it's safe.
Adjusting Maxtransfer is safe, and does not affect the data on the drive
but only how it is read or written.
Of course it is always best to do backups anyway in case you make a
mistake and change the wrong setting.
Regards
------------------------------------------------------------------------
Porsche Boxter. You and a friend. Nine dream days from
Napa Valley to Beverly Hills. Provided by CarsDirect.com.
Click to enter.
http://click.egroups.com/1/3993/3/_/644178/_/958223268/
------------------------------------------------------------------------