Having problems with your Toshiba Satellite A215-S4807 Notebook ?

Cant install OS BOOTMGR is missing

\015 I've rebooted vista home premium and linux operating systems many times before mostly in dual boot so I never had a problem, I installed linux on the hard drive using all storage space possible. Computer hardware operates smooth when I use computer with linux ubuntu live cd. I can't install no OS on laptop, BOOTMGR is missing and windows cd automatic repairs cannot fix this. computer is Toshiba laptop A215-S4807\015

Answers :

Usually the installer should have a function to allow you to wipe the disk, or delete partitions.

If it doesn't, and you do not care about the hard disk content, and it is acceptable to wipe out the entire hard disk, you can do so in Linux.

(There is a utility which will do everything for you - Darik's Boot and Nuke, you find it at http://www.dban.org/ . I'm also giving you the "manual" instructions below, though).

Boot with Ubuntu Live, open Terminal, become root with 'su'.

Now you need to know how your disk is "seen" by Linux. Since you only have the one disk and nonexistent disks will fail, we can try all the likely hard disk names. The first command that does NOT fail saying "No such device" is the good one:

fdisk /dev/sda
fdisk /dev/hda
fdisk /dev/cciss/c0d0
fdisk /dev/rd/c0d0
fdisk /dev/ida/c0d0

One of these commands (likely the first or second) will give you a menu ending in "Command (m for help)". type "p" and press Enter to list partitions; there should be only one and it should be a Linux type, probably 83. If it isn't, stop - something's wrong. But it should be.

The first column will say something like "/dev/sda3". Note the number at the end, here "3". You'll likely have "1".

Now type, "d" and press Enter. You'll be asked which partition to delete. Type the same number you saw earlier. Type "w" and Enter to save changes and exit. Type "q" and Enter to exit without changes. The partition can still be recovered, but the disk is now "unlocked".

Reboot and install the OS of your choice. The previous hard disk contents will be permanently lost, and you'll get a shiny new empty partition with a working OS.

You can also erase the disk without using fdisk (but you still need to know how it's named, and for that you can use fdisk) by typing

dd if = /dev/zero of = /dev/sda bs=1M count = 12

Here we suppose the disk turned out to be /dev/sda.

This will write twelve megabytes of zeroes to the beginning of the disk, effectively wiping any OS information there could be there. All disk data are as good as lost. The disk is now, to all installing purposes, a perfect blank. Reboot and install the OS of your choice.

Just for the record, omitting "count" will zealously wipe out the whole hard disk surface, all partitions, all data, irretrievably (except using residual hysteresis detection equipment - doubt if even NSA would take the trouble). This can be handy when decommissioning computers.

There are also
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