Something has changed in a recent VMware update that now prevents me from just
using dd to clone my Plan 9 VMware instance onto a CF device (the MBR is no
longer set correctly after using dd). Now I'm looking for a way to get Plan 9
to mount and clone a file system over to a SanDisk CF device, does anyone have
any pointers on getting this to work?
I can see the device in /n/usb/sdU0.0, the geometry 'looks' correct. But I
can't cleanly mount the device and have it show up consistently in /dev/ for
all the disk tools to have at it.
If I do:
usb/disk
I get "no device found". But if instead the command is:
usb/usbfat:
I get /dev/sdU0.0 and /dev/sdU0.1 with plausible trees (ctl data raw). The
sdU0.0 corresponds to a usb/probe that returns:
ep3.0 storage csp 0x500608 vid 0x0781 did 0xa1a2 'SanDisk ' 'Extreme
III USB2.0 Reader/Writer' ehci
So far I've found that the following process gets me most of the way there:
cpu% mount /srv/usb /n/usb
cpu% disk/partfs /n/usb/sdU0.0/data
cpu% disk/mbr -m /386/mbr /dev/sdXX/data
cpu% disk/fdisk -baw /dev/sdXX/data
cpu% disk/prep /dev/sdXX/plan9
9fat 0 204800 (204800 sectors, 100.00 MB)
nvram 204800 204801 (1 sectors, 512 B )
fossil 204801 3211674 (3006873 sectors, 1.43 GB)
swap 3211674 3963393 (751719 sectors, 367.05 MB)
empty 3963393 3999618 (36225 sectors, 17.68 MB)
A little tweak corrects for the empty space. After getting this far, how safe
is doing:
dd -if=/dev/sdC0/fossil -of=/dev/sdXX/fossil
I get my Soekris box booting off of this, but it is not optimal. USB dd
transfers are SLOW, as in it took over an hour and a half for dd to complete
the above command.
-jas
