+ Post New Thread
Results 1 to 6 of 6
Hardware Thread, SAS Drive and Controller Help in Technical; Right i've got a LSI Megaraid SAS 8308ELP with has 5x Fujitsu MAX3174RC's hanging off it in raid 5. One ...
  1. #1

    Join Date
    Apr 2006
    Location
    Bamber Bridge
    Posts
    192
    Thank Post
    3
    Thanked 10 Times in 10 Posts
    Rep Power
    18

    SAS Drive and Controller Help

    Right i've got a LSI Megaraid SAS 8308ELP with has 5x Fujitsu MAX3174RC's hanging off it in raid 5. One of the drives has failed and I can't find anyone selling these drives. HP sell a refirmwareded version but it shows up as a different size in the bios so won't add it into the raid. The Fujitsu's come in at 140272.0mb and the HP firmwared one is 139815.omb or similar. Does anyone have any ideas as to what other drive we could put in it?

  2. #2

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    So long as the drive itself is the same spec - RPM, cache etc... you can insert a physically larger drive - a 200GB drive for example. The RAID array would only see 140272.0mb of it and the rest unfortunately would be wasted, but it would work.

  3. #3

    Join Date
    Apr 2006
    Location
    Bamber Bridge
    Posts
    192
    Thank Post
    3
    Thanked 10 Times in 10 Posts
    Rep Power
    18
    I thought that, but wanted to make sure. Would it have to be the same interface? IE SAS3gbp/s or would a SAS 6gbp/s drive work in it?

  4. #4

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    Good question - I am presuming the rules for SAS are the same as SATA.

    They're all compatible with each other, so if you installed a SATA III drive in a SATA II port, it would work at SATA II speeds. I would check with your supplier, but I believe it is the same with SAS.

  5. #5

    Join Date
    Jan 2012
    Location
    Co Durham, UK
    Posts
    67
    Thank Post
    2
    Thanked 1 Time in 1 Post
    Rep Power
    0
    Quote Originally Posted by Michael View Post
    Good question - I am presuming the rules for SAS are the same as SATA.

    They're all compatible with each other, so if you installed a SATA III drive in a SATA II port, it would work at SATA II speeds. I would check with your supplier, but I believe it is the same with SAS.
    It should work [using mixed SATA II and SATA III], as each drive has its own port in SATA; but your array will only be as fast as the slowest drive.

    Regarding the use of different sized drives; you can create an array using any mixture of drive sizes, but again, the array can only be as big as your smallest drive, and as fast as your slowest drive!

    Depending on what space you have left over, you can use redundant space to create a simple volume, or (if you have space on two drives), a mirrored volume.

    When disk space was more expensive and slower than it is now, we often used a simple volume for the OS, on the grounds that we could easily re-install it; but data is more important and more diffucult to replace, so there is good reason to configure an array sch as Raid 5EE which provides redundancy, and will rebuild itself quickly in the event of a drive failure.

    I have, in the past, also created a clone of the OS disk on a spare hard drive, so that if things go wrong, it is simply a matter of swapping drives to get going again.

    NN

  6. #6


    Join Date
    Feb 2007
    Location
    51.405546, -0.510212
    Posts
    8,766
    Thank Post
    222
    Thanked 2,630 Times in 1,938 Posts
    Rep Power
    779
    Quote Originally Posted by Ste_Harve View Post
    The Fujitsu's come in at 140272MB and the HP firmwared one is 139815MB or similar.
    Another option is to "cut" the drive using MHDD. This would enable you to resize the Fujitsu drive to exactly 139,815MBs and be transparent to both the OS and RAID controller.

    hddguru.com/software/2005.10.02-MHDD/mhdd_manual.en.html#hpa

SHARE:
+ Post New Thread

Similar Threads

  1. BBC and Shockwave driving me nuts! Help please!
    By elsiegee40 in forum Windows
    Replies: 2
    Last Post: 8th September 2009, 05:09 PM
  2. Problem with Home Drive and login scripts
    By ArchersIT in forum Windows
    Replies: 4
    Last Post: 11th July 2007, 12:17 PM
  3. GTK restrict drives and NTFS permissions
    By CyberNerd in forum Thin Client and Virtual Machines
    Replies: 2
    Last Post: 11th May 2007, 05:32 PM
  4. GUI and some help needed
    By MK-2 in forum Windows
    Replies: 4
    Last Post: 1st March 2007, 05:18 PM
  5. Replies: 10
    Last Post: 16th February 2007, 06:35 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •