🚀 go-pugleaf

Chris Peek (cpeek@shore.intercom.net) wrote:
: From a practical point of view I think a far smaller run of data
: should give you enough statisitical confidence that the 24\"cables are
: or aren't munging up your data. You might also think about how long
: it's going to take even the fastest EIDE to complete your radom
: read/write and seek test. After the drive and system buffers and
: caches are all saturated the real world transfer rates of most drives
: falls _way_ down no matter how fast the original platter to bus  spec
: is.  Try transferring a gig worth of  10,000 files from EIDE drive to
: EIDE drive on a fast PCI or VLB sytem with say 16 megs of RAM sometime
: and see what happens to the transfer speed after about 3-8 minutes.
: 2-4 MPS platter to bus soon becomes a memory.   500K ps is more like
: it depending on file size. At this rate your terabyte transfer is
: going to take  around 2,000,000 seconds.  2 sec for a meg/ 2,000 secs
: for a gig / 2,000,000 secs for a terabyte.

That's only 500 hours, about 10 days. Not impossible, in fact, as I can
have one drive on test whenever the machine is free.
I agree, that it's probably a lot excessive, I'd rather check it too
much than too little though.
Having great fun at the moment making the integral metalwork for the box,
to hold/cool the drives.
Thanks for the response.

: Ian Stirling <root@mauve.demon.co.uk> wrote:

: >I'm making an external drive box for my SCSI and IDE drives, 1\\" thick wood,
: >no airholes, fluid loop cooling (for QUIETNESS, I'm sleeping 6\\" from it, and
: >don't want it to intrude)
: >The problem I have, is I'd like to extend the IDE cables a little beyond the
: >18\\" maximum, maybe out to 24\\" or so. But, I don't want to lose data.
: >Hence, I want to run a LARGE amount of data throgh it, about 1Tb or so
: >(1000Gb) doing random read/write/seek.
: >This should take the error uncertainty to below 1 in 10^12 or on the same
: >order as the spec for soft errors.
: >Is there one out there, or do I have to write my own?
: >Ian Stirling.