Problem with Create a File System on Linux

[jmgmad]

Hello to all,

I need help with a problem that I have in red hat enterprise linux version 5. I intend to create a file system but I'm having troubles because it show me an error after typing the command to create a filesystem:

mke2fs —b 4096 /dev/sap (mke2fs —b 4096 /dev/<device>)

The error finish with a message:
"The device apparently does not exist; did you specify it correctly?"


I don´t understand why this happens... and I´m newest in Linux, someone can help me with this problem?


Best regards,
João Dimas - Portugal

[Rubberman]

What is /dev/sap? You need to specify a valid device+partition to create a file system, such as /dev/sda1, etc. Post the results here from the command fdisk -l, then we can probably tell you what to do.

[jmgmad]

Hello Rubberman,

I´m SAP Administrator and so I want to install a sap system on Red Hat Enterprise Linux v.5, and this /dev/sap would be the file system that I want to create for the directories of sap and other file system that I wanted create would be for the Oracle database as /dev/ora.

Next I´ll put here the results of some commands like fdisk -l ; vgdisplay ; lvdisplay ; df -m.

[root@redhatsap ~]# fdisk -l

Disk /dev/sda: 193.2 GB, 193273528320 bytes
255 heads, 63 sectors/track, 23497 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 23497 188635230 8e Linux LVM

[root@redhatsap ~]# vgdisplay
--- Volume group ---
VG Name VolGroup01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 179.88 GB
PE Size 32.00 MB
Total PE 5756
Alloc PE / Size 5756 / 179.88 GB
Free PE / Size 0 / 0
VG UUID oSA0Rl-Cz8c-nVqc-pH1A-9SKw-XvZk-pTgnRU

[root@redhatsap ~]# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup01/LogVol00
VG Name VolGroup01
LV UUID Jln8g0-YwHm-KVim-KmqT-0IPF-TDnJ-u87BRX
LV Write Access read/write
LV Status available
# open 1
LV Size 174.22 GB
Current LE 5575
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0

--- Logical volume ---
LV Name /dev/VolGroup01/LogVol01
VG Name VolGroup01
LV UUID c0JLG5-4ghB-Iftx-MucI-6MWV-IR9L-vRfQMV
LV Write Access read/write
LV Status available
# open 1
LV Size 5.66 GB
Current LE 181
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1

[root@redhatsap ~]# df -m
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup01-LogVol00
172813 3558 160335 3% /
/dev/sda1 99 13 82 14% /boot
tmpfs 1898 0 1898 0% /dev/shm
/dev/hdc 3409 3409 0 100% /media/RHEL_5.4 x86_64 DVD

[Rubberman]

So, you want to format the logical volume? That should have been done when you installed RHEL. Post the results here of the mount command.