jessie grub issue

Hello:
In a new installation of amd64 (raid 1 two devices md0 md1) from the recent
testing installer, I made some mistake as to md0, whereby the system does
not boot. The situation is illustrated below (booting live SystemRescueCD):

root@sysresccd /root % fsarchiver probe simple gig64

[======DISK======] [=============NAME==============] [====SIZE====] [MAJ]
[MIN]

[sda ] [WDC WD1002FAEX-0 ] [ 931.51 GB] [ 8] [ 0]

[sdb ] [WDC WD1002FAEX-0 ] [ 931.51 GB] [ 8] [ 16]

[sr0 ] [DVD RW AD-7260S ] [ 380.83 MB] [ 11] [ 0]

 [=====DEVICE=====] [==FILESYS==] [======LABEL======] [====SIZE====] [MAJ]
[MIN]

[loop0 ] [squashfs ] [<unknown> ] [ 266.84 MB] [ 7] [ 0]

[sda1 ] [linux_raid_] [gig64:0 ] [ 285.00 MB] [ 8] [ 1]

[sda2 ] [linux_raid_] [gig64:1 ] [ 931.23 GB] [ 8] [ 2]

[sdb1 ] [linux_raid_] [gig64:0 ] [ 285.00 MB] [ 8] [ 17]

[sdb2 ] [linux_raid_] [gig64:1 ] [ 931.23 GB] [ 8] [ 18]

[md0 ] [LVM2_member] [<unknown> ] [ 284.69 MB] [ 9] [ 0]

[md1 ] [LVM2_member] [<unknown> ] [ 931.11 GB] [ 9] [ 1]

[dm-0 ] [ext3 ] [<unknown> ] [ 3.72 GB] [253] [ 0]

[dm-1 ] [ext3 ] [<unknown> ] [ 55.88 GB] [253] [ 1]

[dm-2 ] [ext3 ] [<unknown> ] [ 10.24 GB] [253] [ 2]

[dm-3 ] [ext3 ] [<unknown> ] [ 11.18 GB] [253] [ 3]

[dm-4 ] [ext3 ] [<unknown> ] [ 3.72 GB] [253] [ 4]

[dm-5 ] [swap ] [<unknown> ] [ 37.25 GB] [253] [ 5]

[dm-6 ] [ext3 ] [<unknown> ] [ 809.11 GB] [253] [ 6]



Actually, it would be like below, in another amd 64 (wheezy) installation
on another box:

root@tya64:/home/francesco# fsarchiver probe simple tya64

[======DISK======] [=============NAME==============] [====SIZE====] [MAJ]
[MIN]

[sda ] [ST500DM002-1BD14 ] [ 465.76 GB] [ 8] [ 0]

[sdb ] [ST500DM002-1BD14 ] [ 465.76 GB] [ 8] [ 16]

 [=====DEVICE=====] [==FILESYS==] [======LABEL======] [====SIZE====] [MAJ]
[MIN]

[sda1 ] [linux_raid_] [tya64:0 ] [ 187.00 MB] [ 8] [ 1]

[sda2 ] [linux_raid_] [tya64:1 ] [ 465.29 GB] [ 8] [ 2]

[sdb1 ] [linux_raid_] [tya64:0 ] [ 187.00 MB] [ 8] [ 17]

[sdb2 ] [linux_raid_] [tya64:1 ] [ 465.29 GB] [ 8] [ 18]

[md0 ] [ext2 ] [<unknown> ] [ 186.81 MB] [ 9] [ 0]

[md1 ] [LVM2_member] [<unknown> ] [ 465.16 GB] [ 9] [ 1]

[dm-0 ] [ext3 ] [<unknown> ] [ 952.00 MB] [253] [ 0]

[dm-1 ] [swap ] [<unknown> ] [ 13.97 GB] [253] [ 1]

[dm-2 ] [ext3 ] [<unknown> ] [ 27.94 GB] [253] [ 2]

[dm-3 ] [ext3 ] [<unknown> ] [ 9.31 GB] [253] [ 3]

[dm-4 ] [ext3 ] [<unknown> ] [ 9.31 GB] [253] [ 4]

[dm-5 ] [ext3 ] [<unknown> ] [ 2.79 GB] [253] [ 5]

[dm-6 ] [ext3 ] [<unknown> ] [ 400.47 GB] [253] [ 6]


Grateful for indications how to remedy (from live SystemrescueCD, or
otherwise). I have no experience with such manipulations


francesco pietra