FreeBSD 7.1 + RAID0 - Striping

Bueno, hoy tengo que montar un monstruo en almacenamiento, sera un RAID0 por software, los datos no son criticos y el limitante es el factor dinero...

Informacion de los discos

6 HITACHI de 1TB SATA II

La organizacion

/dev/ad0 de 1TB FreeBSD 7.1 amd64

/ 1G
swap 4G
/var 4G
/tmp 1G
/usr 20G
/home 873G

5 SATAs 1TB cada uno para el raid0 por sofware
/dev/ad1
/dev/ad2
/dev/ad3
/dev/ad10
/dev/ad8

1) Instalar FreeBSD 7.1
(ya sabemos como, asi que no lo explicare, solo decir que se instala lo basico [X] 6 Kernel deve...)

2) Configurar los discos
Segun el manual http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-striping.html

Solo modifico unas cosas en mi caso

Creating a stripe of unformatted ATA disks

1. Load the geom_stripe.ko module:

   # kldload geom_stripe
   

2. Ensure that a suitable mount point exists. If this volume will become a root partition, then temporarily use another mount point such as /mnt:

   # mkdir /mnt
   

3. Determine the device names for the disks which will be striped, and create the new stripe device. For example, to stripe two unused and unpartitioned ATA disks, for example /dev/ad2 and /dev/ad3:

   # gstripe label -v st0 /dev/ad1 /dev/ad2 /dev/ad3 /dev/ad10 /dev/ad8
   Metadata value stored on /dev/ad1.
   Metadata value stored on /dev/ad2.
   Metadata value stored on /dev/ad3.
   Metadata value stored on /dev/ad10.
   Metadata value stored on /dev/ad8.
   Done.
   

4. Write a standard label, also known as a partition table, on the new volume and install the default bootstrap code:

   (Esta parte la omito, ya que bsdlabel no trabaja con mas de 4TB)
   # bsdlabel -wB /dev/stripe/st0
   

5. This process should have created two other devices in the /dev/stripe directory in addition to the st0 device. Those include st0a and st0c. At this point a file system may be created on the st0a device with the newfs utility:

   (Como omiti bsdlabel, el siguiente comando es sin la a al final)
   # newfs -U /dev/stripe/st0
   

   Many numbers will glide across the screen, and after a few seconds, the process will be complete. The volume has been created and is ready to be mounted.

To manually mount the created disk stripe:

# mount /dev/stripe/st0 /mnt

To mount this striped file system automatically during the boot process, place the volume information in /etc/fstab file. For this purpose, a permanent mount point, named stripe, is created:

# mkdir /home/stripe
# echo "/dev/stripe/st0 /stripe ufs rw 2 2" \
>> /etc/fstab

The geom_stripe.ko module must also be automatically loaded during system initialization, by adding a line to /boot/loader.conf:

# echo 'geom_stripe_load="YES"' >> /boot/loader.conf

Update:
Si queremos hacer RAID0 con ZFS...
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/filesystems-zfs.html
http://wiki.freebsd.org/ZFSQuickStartGuide

(desmontar el stripe)
# umount /stripe

(deshacer el stripe)
# gstripe unload /dev/stripe/st0
# gstripe clear -v /dev/ad1
# gstripe clear -v /dev/ad2
# gstripe clear -v /dev/ad3
# gstripe clear -v /dev/ad6
# gstripe clear -v /dev/ad8

(quitar la linea del fstab)
#/dev/stripe/st0 /stripe ufs rw 2 2

20.2.2.1 Single Disk Pool
# zpool create tank ad1 ad2 ad3 ad6 ad8

# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad0s1a    989M    419M    491M    46%    /
devfs          1.0K    1.0K      0B   100%    /dev
/dev/ad0s1g    873G     40K    803G     0%    /home
/dev/ad0s1e    989M     12K    910M     0%    /tmp
/dev/ad0s1f     19G    2.3G     16G    13%    /usr
/dev/ad0s1d    3.9G     34M    3.5G     1%    /var
tank           4.5T    128K    4.5T     0%    /tank

# zfs create tank/data

# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad0s1a    989M    419M    491M    46%    /
devfs          1.0K    1.0K      0B   100%    /dev
/dev/ad0s1g    873G     40K    803G     0%    /home
/dev/ad0s1e    989M     12K    910M     0%    /tmp
/dev/ad0s1f     19G    2.3G     16G    13%    /usr
/dev/ad0s1d    3.9G     34M    3.5G     1%    /var
tank           4.5T    128K    4.5T     0%    /tank
tank/data      4.5T    128K    4.5T     0%    /tank/data

(para eliminar el ZFS)
# zfs destroy /tank/data

(para eliminar el pool)
# zpool destroy /tank

Nota con ZFS tambien se puede hacer un RAID5 (lo denomina "raidz")
Para RAID5
# zpool create storage raidz ad1 ad2 ad3 ad6 ad8

En este caso la unidad sera mas pequeña

bueno, parece que todo quedo listo...