Likely it was a combination of the (lack of) CPU speed along
with a bios that didn't accomodate using DMA for drive
transfers (in DOS, without a driver loaded). This CPU load
is in combination with the compression or decompression,
such that the bottleneck then may not be the source &
destination partitions' logical placement.
While I have no reason to doubt your explanation, I wonder why
something so computationally unintensive as sucking and spitting would
overwhelm even a 500 MHz K6-II (my old machine) to the extent you have
stated.
The speed given by DIP was around 120-140 MB/min. Maybe that will help
you figure out what the bottleneck was.
I can't use DIP on my new system - it brainfarts when confronted with
80GB drives.LOL. It whines about not enough (Caldera) DOS memory and
that includes after loading MEMSYS.
Not that I want to use it - it's really a piece of complete shit. I am
glad Symantec now has it - they can give it a proper burial.
BTW, for those who might have been following the Enermax ES-352
RAID/Backup saga I got myself into, I think I may have it working well
enough to keep. I believe the disk corruption problem was caused by
Acronis True Image 8. As you know, it loads some agents that Acronis
claims are necessary even if you never use the Windows version (I use
only the CD version). The Enermax unit warns about "low-level" disk
operations (eg, SMART) messing things up. so I yanked TI out. I used
the lengthy procedure for cleaning up the Registry that is posted on
the Acronis forum. What a bummer.
In any event I have not experienced a corrupted boot disk since and I
have been doing the same things as before. However, Enermax needs to
fix some problems, like not forcing a backup just because you insert
the target tray, like providing a new revision of their software with
error codes that make sense, like providing the user with the option
to buy extra trays for more than 2 HDs, etc.
Nevertheless, even with these limitations (which are certainly not any
different than most of the crap on the market), the unit does what it
is intended for - an automatic hardware daily backup device. It has
saved my arse on several occasions. The other day HP wrote me that
there was a printer update on their website so I tried to download it
but it would not execute. When I finally gave up, I could not delete
it. I even used NTFS4DOS and could not get rid of it. What a bummer.
But because I had an easy restore with the backup clone created just a
couple hours earlier, I did not have to fuss with anything. I just
swapped the disks around and I was back on the air. In the past when I
had some data I collected in between, I used XCOPY with the /D:
parameter to collect all the new stuff onto a removable disk and then
I put it onto the new boot disk. I could use NTBACKUP, but I like to
restore the data by hand because then I know exactly what is going on.
It's just Eudora mailbox stuff anyway and some other ascii files like
bookmarks etc. that I wrote in the period after the last backup.
So, unless something drastic happens, I am going to keep the Enermax
ES-352 because it is so convenient - and despite the nuisances listed
above, it is also very friendly. Set it, forget it, use it when needed
to restore a complete disk clone. I keep one per day and one per week
so I am covered for most contingencies.
--
Map of the Vast Right Wing Conspiracy
http://home.houston.rr.com/rkba/vrwc.html
"Whatever crushes individuality is despotism."
--John Stuart Mill, "On Liberty"