# disktype hd80mb.image 

--- hd80mb.image
Regular file, size 80.15 MiB (84038656 bytes)
ATARI ST partition map
Partition 1: 4.768 MiB (4999680 bytes, 9765 sectors from 2, bootable)
  Type "GEM" (Standard GEMDOS)
  FAT16 file system (hints score 3 of 5)
    Volume size 4.741 MiB (4971520 bytes, 4855 clusters of 1 KiB)
Partition 2: 28.61 MiB (29999616 bytes, 58593 sectors from 9767)
  Type "GEM" (Standard GEMDOS)
  FAT16 file system (hints score 3 of 5)
    Volume size 28.49 MiB (29874176 bytes, 29174 clusters of 1 KiB)
Partition 3: 38.15 MiB (40000000 bytes, 78125 sectors from 68360)
  Type "BGM" (Big GEMDOS)
  FAT16 file system (hints score 3 of 5)
    Unusual sector size 1024 bytes
    Volume size 38.06 MiB (39909376 bytes, 19487 clusters of 2 KiB)

# ./matari.sh hd80mb.image
Atari parition has been mounted under /mnt:
total 24
drwxr-xr-x 2 root root 8192 Jan  1  1970 drive0
drwxr-xr-x 2 root root 8192 Jan  1  1970 drive1
drwxr-xr-x 3 root root 8192 Jan  1  1970 drive2

# find /mnt
/mnt
/mnt/drive0
/mnt/drive0/NEWDESK.INF
/mnt/drive2
/mnt/drive2/CHKDISK3
/mnt/drive2/CHKDISK3/CHKDISK3.PRG
/mnt/drive2/CHKDISK3/CHKDISK3.RSC
/mnt/drive1
/mnt/drive1/HDUTIL.PRG
/mnt/drive1/ICDBOOT.PRG
/mnt/drive1/ICDFMT.PRG
/mnt/drive1/ICDFMT.DAT

# parted Atari_ST_Games_Petari_1_ACSI_800MB_32+3x256MB_ICD.hd print
Model:  (file)
Disk /tmp/Atari_ST_Games_Petari_1_ACSI_800MB_32+3x256MB_ICD.hd: 839MB
Sector size (logical/physical): 512B/512B
Partition Table: atari
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      1024B   33.6MB  33.6MB  primary               boot
 2      33.6MB  302MB   268MB   primary
 3      302MB   570MB   268MB   primary
 4      570MB   838MB   268MB   primary

# find .
.
./drive0
./drive0/ICDBOOT.SYS
./drive0/ICDPRO_6.55A
./drive0/ICDPRO_6.55A/AUTO
./drive0/ICDPRO_6.55A/AUTO/ICDBOOT.PRG
./drive0/ICDPRO_6.55A/DOCS
./drive0/ICDPRO_6.55A/DOCS/ENGLISH
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/ADSCSI.DOC
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/DESKTOP.DOC
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/HDPARK.DOC
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/HOST.DOC
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/RATEHD.DOC
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/READ.ME
./drive0/ICDPRO_6.55A/DOCS/ENGLISH/SUPERCH.DOC
./drive0/ICDPRO_6.55A/ADSCSI.CPX
./drive0/ICDPRO_6.55A/BOOTFIX.TOS
./drive0/ICDPRO_6.55A/CACHEHIT.TOS
./drive0/ICDPRO_6.55A/CACHEOFF.PRG
./drive0/ICDPRO_6.55A/CACHEON.PRG
./drive0/ICDPRO_6.55A/CFGCBOOT.PRG
./drive0/ICDPRO_6.55A/COLDBOOT.PRG

mount: /mnt/drive1: wrong fs type, bad option, bad superblock on /dev/loop1, missing codepage or helper program, or other error.
mount: /mnt/drive2: wrong fs type, bad option, bad superblock on /dev/loop2, missing codepage or helper program, or other error.
mount: /mnt/drive3: wrong fs type, bad option, bad superblock on /dev/loop3, missing codepage or helper program, or other error.

#!/bin/bash
#
# Mount Atari partition under Linux
# by Monsoft (c) 29.10.2019
#
# Require: parted, losetup, awk, grep, cut and root  privileges
#
# Usage: scriptname hdimage [-u]
# -u    unmont partitions

IMAGE=$1
UMOUNT=$2

MPOINT=/mnt
DNAME=drive

if [ "$UMOUNT" == "-u" ];then
    for i in $(losetup -a |grep $IMAGE|cut -d":" -f1);do
            DNUM=${i: -1}
        umount $MPOINT/$DNAME$DNUM
            rm -rf $MPOINT/$DNAME$DNUM
    done
    losetup -D
    echo "All mounts has been removed"
else
    PART=($(parted $IMAGE unit b print| awk '/primary/ { print $2,$4 }'|tr -d B))

    PLEN=${#PART[@]}

    for (( i=0; i<$PLEN; i++ )); do
        PSTART=${PART[$i]}
        ((i++))
        PSIZE=${PART[$i]}
        losetup --find --offset $PSTART --sizelimit $PSIZE $IMAGE
    done

    for i in $(losetup -a |grep $IMAGE|cut -d":" -f1);do
        DNUM=${i: -1}
        mkdir $MPOINT/$DNAME$DNUM
        mount -t vfat $i $MPOINT/$DNAME$DNUM
    done
    echo "Atari parition has been mounted under $MPOINT:"
    ls -l $MPOINT
fi

root@leon:/tmp# ./matari.sh hd80mb.image
Atari parition has been mounted under /mnt:
total 40
drwxr-xr-x 2 root root  7168 Jan  1  1970 drive0
drwxr-xr-x 2 root root  9216 Jan  1  1970 drive1
drwxr-xr-x 2 root root 10240 Jan  1  1970 drive2
drwxr-xr-x 2 root root  8192 Jan  1  1970 drive3
drwxr-xr-x 2 root root  4096 Jul 19 21:34 ipod
root@leon:/tmp# find /mnt/
/mnt/
/mnt/drive0
/mnt/drive0/SHDRIVER.SYS
/mnt/drive1
/mnt/ipod
/mnt/drive2
/mnt/drive3
root@leon:/tmp# ./matari.sh hd80mb.image -u
All mounts has been removed