I have botched my disklabel. Can I recover my data?

[Ottavio Caruso <ottavio2006-usenet2012%yahoo.com@localhost>]

Memo to myself: backup!

In a failed attempt at editing the disklabel, I eventually deleted it
and obviously I could not boot again. I did not save the disklabel
geometry before hand (Yes, I know...), so I booted from the install
disk and tried to recreate the information by hand. So I did:

# disklabel -i ld0

I selected 10GB for the whole disk and 9.5 GB for the NetBSD
partition, because I had a 500MB swap partition, saved, crossed
fingers, rebooted and:

### START ####

Tue Mar 15 10:16:49 GMT 2022
Starting root file system check:
Can't open /dev/rld0a: Device not configured
CAN'T CHECK FILE SYSTEM.
/dev/rld0a: UNEXPECTED INCONSISTENCY; RUN fsck_ffs MANUALLY.
Automatic file system check failed; help!
ERROR: ABORTING BOOT (sending SIGTERM to parent)!
[1]   Terminated              rc_real_work "${@}" 2>&1 |
      Done(1)                 rc_postprocess
Enter pathname of shell or RETURN for /bin/sh:
#/bin/ksh
# fdisk ld0
Disk: /dev/rld0
NetBSD disklabel disk geometry:
cylinders: 16383, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 20971520, bytes/sector: 512

BIOS disk geometry:
cylinders: 1023, heads: 255, sectors/track: 63 (16065 sectors/cylinder)
total sectors: 20971520

Partitions aligned to 16065 sector boundaries, offset 63

Partition table:
0: NetBSD (sysid 169)
    bootmenu: NetBSD
    start 64, size 19456724 (9500 MB, Cyls 0/1/2-1211/32/57), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Bootselector disabled.
First active partition: 0
Drive serial number: 0 (0x00000000)
# disklabel ld0
# /dev/rld0:
type: unknown
disk: ld0
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 16383
total sectors: 20971520
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

5 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 c:  19456724        64     unused      0     0        # (Cyl.      0*-  19302*)
 d:  20971520         0     unused      0     0        # (Cyl.      0 -  20805*)
 e:  18432224        64     4.2BSD      0     0     0  # (Cyl.      0*-  18285)

### END ###


So, at this point I wonder if there is anything I can do. I haven't
played with NetBSD for a while and disklabel has always been a problem
for me.

I wonder if I can at the very least recover some data of the old disk
and dump it somewhere else. It's a qemu disk, so it's no big deal
creating one more. The problem is that I had a lot of data.

This is what I see from the recovery shell:




Any help will be appreciated.

-- 
Ottavio Caruso