1U-Raid5.com

1U-Raid5.org


Raid Differences

Raid5 Kernel Patches

Raid Conf Examples

Raid Startup Scripts

ChunkSize-Stride

Left-Symmetric

Raid0145

RaidTools


SW Raid HowTo


Hardware Raid5

IDE_vs_SCSI


Raid Monitoring

Raid Testing


Mailing List-Archives


1U Raid5 ™ --- Laptop Raid5 ™
1U-Raid5.com



  • RAID -- Redundant Array of Inexpensive Disks

  • RAID is NOT a backup system ...
    Please backup all your important data properly

  • RAID1 allows you to boot from the other mirrored disk for some cases of hard disk failures

  • RAID5 protects your data against one hard disk failures


1U Raid5[tm] Servers

Laptop Raid5[tm] Servers
  • Up to 12 laptop drives at 80GB per disks ===>> 960GigaByte Laptop Raid5[tm] Servers ( 1U Chassis )

SW Raid uHow2
  • Apply the raid-2.x.y patches to linux-2.0.x and linux-2.2.x kernels
    • raid0 works out of the box
    • 2.0.x and 2.2.x kernels
      • raid1, raid4, raid5 requires patches
    • 2.4.x kernels
      • raid5 works out of the box

  • Download and install the Older raidtools if you need it ( local copy )
    • ckraid, mdcreate, mdadd, mdrun, mdstop

  • Download and install the current raidtools ( local copy )
    • mkraid, raidstart, raidstop

  • Download and install the latest IDE patches if needed ( local copy )

  • Create /etc/raidtab file

  • RaidStart, mke2fs, mount /Raid5 Commands

  • Backup important Raid5 data

Testing the Raid SubSystem
  • Simulate a hard disk failure
      ( unplug it or take it out with raidhotremove )

  • Create a known to be good 4GB test file
  • Create lots of 4KB, 400KB, 4MB, 400MB, 4GB, 40GB sized files to fill the raid subsystem
    • the copied file should be the same as the original file

  • You should NOT have to touch anything to boot the raid box

  • Power Off and Pull the disk out ( /dev/hda )
    • a properly configured raid system will boot without any intervention
    • copy and compare the Good.4GB.file to the degraded mode raid subsystem

  • Power back up normally and let /dev/hda resync itself ( catchup )
    • it should finish copying the test 4GB file to /dev/hda

  • Power Off and Pull the OTHER disk out ( /dev/hdc )
    • a properly configured raid system will boot without any intervention
    • copy and compare the Good.4GB.file to the degraded mode raid subsystem

  • Power back up normally and let /dev/hdc resync itself ( catchup )
    • it should finish copying the test 4GB file to /dev/hdc

  • Power Off and REPLACE /dev/hda with a brand new disk
    • a properly configured raid system will boot without any intervention

  • Restore the RAID substystem to "normal operations"
    • System finished resyncing ( cat /proc/mdstat )

  • Repeat the process for each disk in the raid array .. till you're tired/confident :-)



  • Linux-Consulting.com == Linux-Consulting.org


  • ISO9660.org


  • BSD-Consulting.org == UNIX-Consulting.org


  • Hardware Products/Solutions

    gigEnn.net
    NetworkNightmare.net

    Custom-Chassis.net
    Linux-1U.net
    ITX-Blades.net
    1U-Raid5.org
    Mini-Box.net


  • Infrastructure Consulting

    WanSim.net
    IPv6-Cloud.org

    Linux-Backup.net
    Linux-Boot.net
    Linux-VOIP.net
    Linux-Video.net
    C-J-K.net


  • Security Consulting

    Linux-Security.net
    Encrypted-Email.net

    Packet-Craft.net
    Linux-Wireless.net

  • Legalese

    Contact

    Legal


  • Copyright © 2000
    Linux-Consulting
    All Rights Reserved.
    Updated: Tue Jun 19 14:23:34 2012 PDT