sloom, nowwhat :
sans formatage, voici une partie des infos demandées :
OS : ISPconfig 3.0.5.4 (Debian 7) (64bits)
ping : ok
ssh, ftp, pop, http : rien
root@rescue:~/.deb# fdisk -l
Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 5BBFF3BA-0588-4E09-A8DB-096778511F23
Device Start End Sectors Size Type
/dev/sda1 40 2048 2009 1004.5K BIOS boot
/dev/sda2 4096 40962047 40957952 19.5G Linux filesystem
/dev/sda3 40962048 3905974271 3865012224 1.8T Linux filesystem
/dev/sda4 3905974272 3907020799 1046528 511M Linux swap
root@rescue:~/.deb# mount /dev/sda1 /mnt/
mount: /dev/sda1 is write-protected, mounting read-only
NTFS signature is missing.
Failed to mount '/dev/sda1': Invalid argument
The device '/dev/sda1' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
root@rescue:~/.deb# mount /dev/sda2 /mnt/
root@rescue:~/.deb# mount /dev/sda3 /mnt/var/
root@rescue:~/.deb# cat /mnt/etc/fstab
#
/dev/sda3 / ext4 errors=remount-ro,usrjquota=aquota.user,grpjquot
a=aquota.group,jqfmt=vfsv0,relatime 0 1
/dev/sda3 /var ext4 defaults,relatime,usrjquota=aquota.user,grpjquot
a=aquota.group,jqfmt=vfsv0 1 2
/dev/sda4 swap swap defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts defaults 0 0
fin de cat /mnt/var/log/dmesg
EXT3-fs (sda2): error: couldn't mount because of unsupported optional features (240)
EXT2-fs (sda2): error: couldn't mount because of unsupported optional features (240)
EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) readonly on device 8:2.
devtmpfs: mounted
Freeing unused kernel memory: 964K (ffffffff823b8000 - ffffffff824a9000)
udevd[257]: starting version 175
random: nonblocking pool is initialized
Adding 523260k swap on /dev/sda4. Priority:-1 extents:1 across:523260k
EXT4-fs (sda2): re-mounted. Opts: (null)
EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro,usrjquota=aquota.user,grpjquota=aquota.group,jq fmt=vfsv0
EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: usrjquota=aquota.user,grpjquota=aquota.group,jqfmt =vfsv0
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
8021q: adding VLAN 0 to HW filter on device eth0
e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None
e1000e 0000:01:00.0 eth0: 10/100 speed: disabling TSO
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
merci pour votre aide, désolé pour cette reréponse tardive