G3 graphite imac 2001 reboot issue

[kcat74]

hi,
i have an old (my first computer!) G3 imac which works perfectly and that I want to pop on ebay as Im moving and do not use it. I did a disc erase of clear space last week but now when I turn it on its showing a folder with a question mark and obv doesn't know how to boot up.

Is there a way of getting it to reboot from a USB drive? I read that Tiger works doing this but i tried it by holding down c as i start up, USB drive inserted with .dmg file of the first disc but it didn't work.

How can i do this? Frustrating as i know it works perfectly but i must have deleted something when doing the erase spare space thing

thanks
Kerrie

 

[Nermal]

Sorry for terseness.
Cmd-Opt-O-F
boot ud:,\\:tbxi

 

[kcat74]

thanks.
its saying bad BTH can't open mac-io/ata etc etc

 

[joevt]

What version of Open Firmware does the 2001 G3 iMac have?

In the ROM dumps I have, only Open Firmware built on 09/22/05 or later has support for the "ud" dev alias. Type devalias to view a list of dev aliases.

Older Macs starting from PowerMac2,1 4.1.9f1 BootROM built on 09/14/01 at 13:18:04 do support USB disks but I think you have to enter the full path of the disk since there's no dev alias for USB disks. I think 2001 iMac is PowerMac4,1 so it should have USB drive support (but I don't have a rom dump of that version to verify).

You said the USB drive has dmg file. Did you use Disk Utility to restore the dmg to a partition on the USB drive? Or is the dmg just a file on the USB disk?