[j-nsp] M7i hard disk hint needed

[Alexander Serkin]

Hi,
Recently our m7i lost its hard disk - it is present in setup, but while 
booting the device is not detected:

Automatic reboot in progress...
/dev/ad0s1a: FILESYSTEM CLEAN; SKIPPING CHECKS
/dev/ad0s1a: clean, 393048 free /dev/ad0s1e: FILESYSTEM CLEAN; SKIPPING 
CHECKS
/dev/ad0s1e: clean, 49144 free (48 frags, 49125 blocks, 0.0% fragmentation)
(8 frags, 6142 blocks, 0.0% fragmentation)
(48 frags, 49125 blocks, 0.0% fragmentation)
mfs: /dev/ad1s1b: Device not configured
/dev/ad1s1f: CAN'T CHECK FILE SYSTEM.
/dev/ad1s1f: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
Can't open /dev/ad1s1f: Device not configured
WARNING:
WARNING: /var mount failed, building emergency /var
WARNING:

are there any possible passes to recover the system, or we need to 
change hard drive?

Is it possible to run system without hard drive temporary and where can 
i find some docs about this?

thanks,
-- 
Sincerely Yours,
Alexander