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As you probably will not recall, our problem had been with a user's
corrupted 20 Mb Bernoulli cartridge (for the BD Lysys II system) -- that was
coming up with an unreadable block message when scanned with hfs check and
was listing that the disk was full but that ZERO files were present. We were
not able to access any of the data and were looking for a way to recover the
files.
To make a long story somewhat shorter, one name kept coming up in many of
your suggestions:
Richard A. Cox
Flow Cytometry Support
PO Box 3450, Saratoga, CA 95070-1450
(phone=408-370-6327; Internet=2359766@mcimail.com)
We sent him our Bernoulli; he found two bad spots on the cartridge (in the
area of the directory), but was able to recover all our data and copy it
over on to a good cartridge. The charge was $100. We recommend him.
In addition, he suggested that we not use the hfs format for our bernoullis
-- but convert them to LIF format. LIF format does not utilize
sub-directories but stores all files in one long series. This means that you
cannot structure your data storage, but there is, evidently, improved disk
performance because of less I/O activity (and, in addition, this frees
about 3Mbytes more storage space on the cartridge). Unofficial advice from
BD confirms that this is a workable option. If you want to know how to
format your Bernoulli cartridges to LIF file structure, ask Richard Cox (who
may have to start charging for this advice if all those unhappy Bernoulli
users start contacting him).
By the way, have any BD users started using optical disks? In our facility
we have gone back to recommending 3-1/2 inch floppies -- they are cheaper (by
byte) than the 20Mbyte bernoullis, they make data organization easier as
long as you have a big disk box, and you certainly don't lose as much data
if a disk fails.....
Again, thanks for all your help. If you need any further information and
can benefit from our mistakes, let me know.
Alice Givan
Alice.L.Givan@dartmouth.edu
NCCC Flow Cytometry Laboratory/Department of Physiology
Dartmouth Medical School
Lebanon, New Hampshire 03756-0001 USA
voice 603-650-7907 fax 603-650-6130
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