Detect grub1 on Debian

sda5 : sda, not-sepboot, grubenv-ok grub2, grub-pc , update-grub, 32, with-boot, is-os, not--efi--part, fstab-without-boot, fstab-without-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, apt-get, grub-install, with--usr, fstab-without-usr, not-sep-usr, standard, farbios, /mnt/boot-sav/sda5.

=================== Recommended repair
Recommended-Repair
This setting will reinstall the grub2 of sda5 into the MBR of sda.
Additional repair will be performed: unhide-bootmenu-10s

grub-install (GNU GRUB 0.97),grub-install (GNU GRUB 0.

Reinstall the GRUB of sda5 into the MBR of sda
Searching for GRUB installation directory ... found: /boot/grub
grub-install /dev/sda: Installing GRUB to /dev/sda as (hd0)...
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0) /dev/fd0
(hd0) /dev/sda
exit code of grub-install /dev/sda:0
Probing devices to guess BIOS drives. This may take a long time.
Searching for GRUB installation directory ... found: /boot/grub
grub-install --recheck /dev/sda: Installing GRUB to /dev/sda as (hd0)...
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0) /dev/fd0
(hd0) /dev/sda
(hd1) /dev/sdb
exit code of grub-install /dev/sda:0

chroot /mnt/boot-sav/sda5 update-grub
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ...

Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N) /usr/sbin/update-grub: line 1094: read: read error: 0: Bad file descriptor

An error occurred during the repair.

---------> purge worked