Re: [ARMini-support] uSD card image uploaded
- From: A Rawnsley <rcomp@xxxxxxxxxxx>
- To: armini-support@xxxxxxxxxxxxx
- Date: Wed, 22 Feb 2012 12:49:26 GMT
> Well, I now managed to upgrade too by copying the above files via
> Jeffrey's SD create. This at least results in booting to the supervisor
> shell since it keeps looking for a scsi::0 drive. No success
> whatsoever in telling it to boot from scsi::4.$ Instead copied
> !Boot and all the run/look at files on a USB pen drive. TBH this
> seems like a big step backward, 2010 to be precise. What's the advantage
> in not being able to boot from your harddisk, using a slowish USB device
> instead? At least got it working though. Now looking forward to
> Sprow's CMOS hardware thingy.
If you save your CMOS settings booting from drive 4, using !SaveCMOS,
then all should be well. No pen required.
Indeed, your old CMOS settings, if saved via !SaveCMOS, should work
fine with 5.18 now your card is properly updated. You were only
affected by the problem because your SD card files were too old to
cope with uenv.txt boot scripts.
Most pens should perform on a par with hard drives via the USB stack
on RISC OS format (limiting factor is the USB stack and un-cached disc
format), so it shouldn't affect you either way.
The default was changed because ROOL supply their !Boots on pen drive,
and that's also how the ARMini boots (ARMini can use both pen and
drive).
Since pen drives are "solid state", you should actually get better
access times etc, but the controllers in most pen drives are quite
limited compared to SSDs.
Remember that the hard drive you mention will be going through a USB
adapter which will impose its own performance restrictions.
Until a board exists with native SATA and/or Filecore gains more
caching, the USB sub-system will continue to be the bottleneck :(
Andrew
--
R-Comp
22 Robert Moffat, High Legh, Knutsford, Cheshire WA16 6PS
Tel: 01925 755043 Fax: 01925 757377 http://www.rcomp.co.uk
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