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Hands-on RAID on Moxa Computer

Hands-on RAID on Moxa Computer . Prepared by: (40min) Date: mm- dd - yyyy. Definition of RAID. Redundant Array of Independent Disks Combine multiple physical disks into one logical unit so to increase read/write performance or data redundancy. Is NOT a reliable backup plan . RAID levels.

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Hands-on RAID on Moxa Computer

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  1. Hands-onRAID on Moxa Computer Prepared by: (40min) Date: mm-dd-yyyy

  2. Definition of RAID Redundant Array of Independent Disks Combine multiple physical disks into one logical unit so to increase read/write performance or data redundancy. Is NOT a reliable backup plan Confidential

  3. RAID levels *Extract from http://en.wikipedia.org/wiki/RAID Confidential

  4. Hardware RAID RAID controller card- usually a PCIe expansion card- calculations are done by the controller (no CPU resource is needed)- high price- thermal/power issue Intel I/O Controller Hub(ICH) - come with the computer but not all ICH supports RAID - V2616 uses ICH9M-SFF, which supports RAID 0,1 Confidential

  5. Software RAID Done by OS, no extra hardware is required Uses CPU resource—performance depends greatly on CPU speed Free tool on Linux: mdadm Confidential

  6. Using mdadmto configure RAID 0 on V2400 series Confidential

  7. Install mdadm the root file system is set to be read-only, change to read-write: #mount –o remount,rw / use apt-get install command to install mdadm #apt-get install mdadm * what is apt? Appendix A Confidential

  8. Package configuration window will appear, select Ok and click Enter Confidential

  9. Use the default setting.Select Ok and click Enter Confidential

  10. Insert USB disks the usb devices are mounted here USB devices will be mounted automatically. You may use the following command can to check the filesystem: #df –h Confidential

  11. Create RAID device unmount the USB devices first #umount /dev/sdb1 #umount /dev/sdc1 create RAID device #mdadm--create /dev/md0 --level=0 --raid-devices=2 /dev/sdb/dev/sdc Confidential

  12. Create RAID device RAID level is 0 Check the RAID device: #mdadm--detail /dev/md0 Confidential

  13. Create RAID device Formate the disk #mkfs-t ext3 /dev/md0 Confidential

  14. Create RAID device the usb devices became /dev/md0, with the disk size of 15G and is mounted to assigned path mount the device somewhere you want #mkdir /home/raid_disk #mount /dev/md0 /home/raid_disk use df command to check the filesysytem again Confidential

  15. Auto-mount the RAID device add this line edit /etc/rc.local like below, the script here will be executed after boot. try reboot the computer with modified and unmodified rc.local and see if /dev/md0 is mounted correctly. Confidential

  16. Appendix A: what is apt? Advanced Packaging tool used on Debianlinux distribution to handle installation and removal of software packages. Important files and commands: /etc/apt/sources.list: Locations to fetch packages from. If your cannot fetch the package, you may want to check if the sources list is still valid. apt-get install package_name: install package_name apt-cache search text: Find package relate to text Confidential

  17. Configure RAID 0 on V2616 Using Intel Rapid Storage Technology Confidential

  18. V2616 RAID Function Configuration The V2616 computers have two storage trays that allow users to install two 2.5-inch SATA hard disks, and support RAID 0 and RAID 1 functions for data backup and recovery. Before using the RAID functions, you need to install two SATA hard disks with the same capacity in the V2616 computer.

  19. Configuring RAID 0 Function 1. Check disk management, right-click on the two disks to initialize.

  20. 2. Launch the Intel Rapid Storage Technology program

  21. 3. Press Create button, select Optimized disk performance (RAID 0) option, and then click Next.

  22. 4. Use the following settings to save the data to another disk. a. Select the disks installed on the computer. b. Specify the volume size by adjusting the scroll bar. c. Determine the data strip size. d. Check Enable volume write-back cache. a b c d

  23. 5. Confirm the settings and then click Create Volume.

  24. 6. Click OK when volume creation is complete.

  25. 7. Check the storage status.

  26. 8. Check Disk Management. Right-click on the disk to initialize disk, and then click OK.

  27. 9. Right-click on the disk to use New Simple Volume Wizard. Click Next to continue.

  28. 10. Enter the partition size in the blank, and then click Next to continue.

  29. 11. Select Assign the following drive letter, and then click Next to continue.

  30. 12. Select Format this partition with the following settings. a. File system: NTFT. b. Allocation unit size: Default. c. Volume label: New Volume (the default value). d. Check Perform a quick format. a b c d

  31. 13. Click Finish to close the New Partition Wizard.

  32. 14. When finished, you may check the disk status from Disk Management column.

  33. 15. Check the My Computer.

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