Red Hat Summit22.5. Adicionando um DASD
Veja a seguir um exemplo de como adicionar um volume DASD:
Nota
Garanta que o dispositivo esteja conectado ou ligado ao sistema Linux se estiver rodando sob a VM.
CP LINK RHEL4X 4B2E 4B2E MR
DASD 4B2E LINKED R/W
Use o comando
cd para ir ao diretório /sys/ que representa aquele volume:
# cd /sys/bus/ccw/drivers/dasd-eckd/0.0.4b2e/
# ls -l
total 0
-r--r--r-- 1 root root 4096 Aug 25 17:04 availability
-rw-r--r-- 1 root root 4096 Aug 25 17:04 cmb_enable
-r--r--r-- 1 root root 4096 Aug 25 17:04 cutype
-rw-r--r-- 1 root root 4096 Aug 25 17:04 detach_state
-r--r--r-- 1 root root 4096 Aug 25 17:04 devtype
-r--r--r-- 1 root root 4096 Aug 25 17:04 discipline
-rw-r--r-- 1 root root 4096 Aug 25 17:04 online
-rw-r--r-- 1 root root 4096 Aug 25 17:04 readonly
-rw-r--r-- 1 root root 4096 Aug 25 17:04 use_diag
Em seguida, verifique se este já está online:
# cat online
0
Se não estiver online, submeta o seguinte comando para trazê-lo online:
# echo 1 > online
# cat online
1
Verifique qual nó do dispositivo de bloco está sendo acessado:
# ls -l
total 0
-r--r--r-- 1 root root 4096 Aug 25 17:04 availability
lrwxrwxrwx 1 root root 0 Aug 25 17:07 block -> ../../../../block/dasdb
-rw-r--r-- 1 root root 4096 Aug 25 17:04 cmb_enable
-r--r--r-- 1 root root 4096 Aug 25 17:04 cutype
-rw-r--r-- 1 root root 4096 Aug 25 17:04 detach_state
-r--r--r-- 1 root root 4096 Aug 25 17:04 devtype
-r--r--r-- 1 root root 4096 Aug 25 17:04 discipline
-rw-r--r-- 1 root root 0 Aug 25 17:04 online
-rw-r--r-- 1 root root 4096 Aug 25 17:04 readonly
-rw-r--r-- 1 root root 4096 Aug 25 17:04 use_diag
Conforme exibido neste exemplo, o dispositivo 4B2E está sendo acessado como
/dev/dasdb.
Use o comando
cd para retornar ao diretório /root e formatar o dispositivo:
# cd
# dasdfmt -b 4096 -d cdl -f /dev/dasdb -l LX4B2E -p -y
cyl 97 of 3338 |#----------------------------------------------| 2%
Quando a barra de progresso atingir o final e a formatação estiver completa, use
fdasd para particionar o dispositivo:
# fdasd -a /dev/dasdb
auto-creating one partition for the whole disk...
writing volume label...
writing VTOC...
checking !
wrote NATIVE!
rereading partition table...
Em seguida, crie um sistema de arquivos na nova partição:
# mke2fs -j /dev/dasdb1
mke2fs 1.35 (28-Feb-2004)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
300960 inodes, 600816 blocks
30040 blocks (5.00%) reserved for the super user
First data block=0
19 block groups
32768 blocks per group, 32768 fragments per group
15840 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 39 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
Monte o novo sistema de arquivos:
# mount /dev/dasdb1 /opt
# mount
/dev/dasda1 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
none on /dev/shm type tmpfs (rw)
/dev/dasdb1 on /opt type ext3 (rw)
Adicione uma entrada ao
/etc/fstab para que o sistema de arquivo seja montado no momento da IPL:
# vi /etc/fstab
# cat /etc/fstab
LABEL=/ / ext3 defaults
1 1
none /dev/pts devpts gid=5,mode=620
0 0
none /dev/shm tmpfs defaults
0 0
none /proc proc defaults
0 0
none /sys sysfs defaults
0 0
/dev/dasdb1 /opt ext3 defaults
1 2
Adicione o dispositivo à linha da opção dasd_mod em
/etc/modprobe.conf. Certifique-se de adicionar o novo dispositivo no final da lista. Caso contrário, o mapeamento do device number : devnode e os sistemas de arquivos não estarão nos dispositivos que costumavam estar.
# vi /etc/modprobe.conf
# cat /etc/modprobe.conf
alias eth0 qeth
options dasd_mod dasd=201,4B2E
Re-execute
mkinitrd para obter as alterações do modprobe.conf para que o dispositivo esteja online e montável após a próxima IPL:
Note that the example below has been modified slightly for readability and for printing purposes. Each line that ends with "(elf64-s390)" should be treated as one line with no spaces, such as
/tmp/initrd.AR1182/lib/dasd_mod.ko(elf64-s390).
# cd /boot
# mv initrd-2.6.7-1.451.2.3.img initrd-2.6.7-1.451.2.3.img.old
# mkinitrd -v initrd-2.6.7-1.451.2.3.img 2.6.7-1.451.2.3
Looking for deps of module ide-disk
Looking for deps of module dasd_mod
Looking for deps of module dasd_eckd_mod dasd_mod
Looking for deps of module dasd_mod
Looking for deps of module dasd_fba_mod dasd_mod
Looking for deps of module dasd_mod
Looking for deps of module ext3 jbd
Looking for deps of module jbd
Using modules: ./kernel/drivers/s390/block/dasd_mod.ko
./kernel/drivers/s390/block/dasd_eckd_mod.ko
./kernel/drivers/s390/block/dasd_fba_mod.ko ./kernel/fs/jbd/jbd.ko
./kernel/fs/ext3/ext3.ko
Using loopback device /dev/loop0
/sbin/nash -> /tmp/initrd.AR1182/bin/nash
/sbin/insmod.static -> /tmp/initrd.AR1182/bin/insmod
copy from
/lib/modules/2.6.7-1.451.2.3/./kernel/drivers/s390/block/dasd_mod.ko
(elf64-s390) to
/tmp/initrd.AR1182/lib/dasd_mod.ko(elf64-s390)
copy from
/lib/modules/2.6.7-1.451.2.3/./kernel/drivers/s390/block/dasd_eckd_mod.ko
(elf64-s390) to
/tmp/initrd.AR1182/lib/dasd_eckd_mod.ko
(elf64-s390)
copy from
/lib/modules/2.6.7-1.451.2.3/./kernel/drivers/s390/block/dasd_fba_mod.ko
(elf64-s390) to
/tmp/initrd.AR1182/lib/dasd_fba_mod.ko
(elf64-s390)
copy from
/lib/modules/2.6.7-1.451.2.3/./kernel/fs/jbd/jbd.ko(elf64-s390) to
/tmp/initrd.AR1182/lib/jbd.ko(elf64-s390)
copy from
/lib/modules/2.6.7-1.451.2.3/./kernel/fs/ext3/ext3.ko(elf64-s390) to
/tmp/initrd.AR1182/lib/ext3.ko(elf64-s390)
Loading module dasd_mod with options dasd=201,4B2E
Loading module dasd_eckd_mod
Loading module dasd_fba_mod
Loading module jbd
Loading module ext3
Execute
zipl para salvar as alteracões do initrd para a próxima IPL:
# zipl -V
Using config file '/etc/zipl.conf'
Target device information
Device..........................: 5e:00
Partition.......................: 5e:01
Device name.....................: dasda
DASD device number..............: 0201
Type............................: disk partition
Disk layout.....................: ECKD/compatible disk layout
Geometry - heads................: 15
Geometry - sectors..............: 12
Geometry - cylinders............: 3308
Geometry - start................: 24
File system block size..........: 4096
Physical block size.............: 4096
Device size in physical blocks..: 595416
Building bootmap '/boot//bootmap'
Building menu 'rh-automatic-menu'
Adding #1: IPL section 'linux' (default)
kernel image......: /boot/vmlinuz-2.6.7-1.451.2.3 at 0x10000
kernel parmline...: 'root=LABEL=/' at 0x1000
initial ramdisk...: /boot/initrd-2.6.7-1.451.2.3.img at 0x800000
Preparing boot device: dasda (0201).
Preparing boot menu
Interactive prompt......: disabled
Menu timeout............: disabled
Default configuration...: 'linux'
Syncing disks...
Done.
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