3 Replies Latest reply on Mar 6, 2015 10:10 AM by allan_intel

    Adding Volume RAID 1 Drive with IRST

    AndyMc.

      So I got a "RAID Ready" system with a 238 GB SSD and a 932 GB HDD. I set it up to do RAID 1. It didn't provide me the ability to choose any options for either partition, beyond which drives and which drive was the system partition, but I created it, and it went off without a hitch.

       

      Unfortunately, I now Have a system where I have a 238 GB Raid 1 array with the extra space on the 932 GB HDD going to waste.

       

      • I got the impression that you could "add volume" to a disproportionately sized RAID array and add an extra volume to it. However, I don't see that option.
      • Disk manager sees a 238 GB with no extra allocated space.
      • The only option is to convert to a flexible data recovery or RAID 0 array
      • I don't see the rumored "Add volume" option anywhere, I'm assuming now that's just for a 2-disk "Raid 0+1" configuration

       

      So, this begs the question, how can I take advantage of that missing disk space?

       

      • Am I getting any benefit of having an extra 694 GB on the RAID array since the system partition its mirroring is only 238 GB?
      • Can I go into IRST on boot, break the RAID configuration, and then partition the large HDD into one partition of the same size as the SDD and then use RAID 1 and then use the rest of the HDD as a regular partition?
      • Can I do the same thing as above but use "flexible data recovery" with an equal sized partition and then use the rest of the HDD as a regular partition?

       

      Configuration below. Note that I may be behind on the IRST version, but Alienware (Dell) hasn't bothered to upgrade to the latest version on this machine. Any magical recipes to configure this would be appreciated. I'm pretty handy with the computer, but I feel like maybe there's something I'm not seeing?

       

      System Information

      OS name:  Microsoft Windows 8.1 Pro

      OS version:  6.3.9600  9200

      System manufacturer:  Alienware

      System model:  Alienware X51 R2

      BIOS:  Alienware, A07

       

      Intel® Rapid Storage Technology enterprise Information

      User interface version:  12.8.2.1000

      Language:  English (United States)

      RAID option ROM version:  12.7.0.1936

      Driver version:  12.8.2.1000

      ISDI version:  12.8.2.1000

       

      Storage System Information

      RAID Configuration

       

       

      Array Name:  SATA_Array_0000

      Size:  488,396 MB

      Available space:  1 MB

      Number of volumes:  1

      Volume member:  RAID1SYS

      Number of array disks:  2

      Array disk:  S1K1NSAF512388

      Array disk:  S314J90F831155

      Disk data cache:  Enabled

       

       

      Volume name:  RAID1SYS

      Status:  Normal

      Type:  RAID 1

      Size:  244,197 MB

      System volume:  Yes

      Data stripe size:  64 KB

      Write-back cache:  Off

      Initialized:  Yes

      Parity errors:  0

      Blocks with media errors:  0

      Physical sector size:  4096 Bytes

      Logical sector size:  512 Bytes

       

      Controller name:  Intel(R) Desktop/Workstation/Server Express Chipset SATA RAID Controller

      Type:  SATA

      Mode:  RAID

      Number of SATA ports:  3

      Number of volumes:  1

      Volume:  RAID1SYS

      Number of spares:  0

      Number of available disks:  0

      Rebuild on Hot Plug:  Disabled

      Manufacturer:  32902

      Model number:  10274

      Product revision:  4

      Direct attached disk:  S1K1NSAF512388

      Direct attached disk:  S314J90F831155

       

       

      Disk on Controller 0, Port 1

      Status:  Normal

      Type:  SATA SSD

      Location type:  Internal

      Usage:  Array disk

      Size:  238 GB

      System disk:  No

      Disk data cache:  Enabled

      Command queuing:  NCQ

      SATA transfer rate: 6 Gb/s

      Model:  SAMSUNG SSD SM841N 2.5 7mm 256GB     

      Serial number:  S1K1NSAF512388

      SCSI device ID:  1

      Firmware:  DXM03D0Q

      Physical sector size:  512 Bytes

      Logical sector size:  512 Bytes

       

       

      Disk on Controller 0, Port 3

      Status:  Normal

      Type:  SATA disk

      Location type:  Internal

      Usage:  Array disk

      Size:  932 GB

      System disk:  No

      Disk data cache:  Enabled

      Command queuing:  NCQ

      SATA transfer rate: 6 Gb/s

      Model:  ST1000LM024 HN-M101MBB               

      Serial number:  S314J90F831155

      SCSI device ID:  3

      Firmware:  2BA30003

      Physical sector size:  4096 Bytes

      Logical sector size:  512 Bytes

       

       

      ATAPI device on Controller 0, Port 0

      Location type:  Internal

      SATA transfer rate: 1.5 Gb/s

      Model:  HL-DT-ST DVD+/-RW GS40N              

      Serial number:  K01EA5C0143

      Firmware:  A100 

        • 1. Re: Adding Volume RAID 1 Drive with IRST
          allan_intel

          When creating RAID 1, it mirrors the drives, always starting with the smallest drive. If the one of the drives size is bigger the remaining space is lost.

          In this case, the volume would be 238 GB size.

          The second and third question, I have never tried that before but sounds suitable, as far as I understand the Intel® Rapid Storage does not see partitions when creating the array, it takes the entire size of the disk.


          Allan.

          • 2. Re: Adding Volume RAID 1 Drive with IRST
            AndyMc.

            So, pursuing this a little bit further, I get that it looks at the disk when doing RAID configurations, so partitioning it and doing RAID 1 again will make no difference. However, I know one of the features of the "flexible data recovery" option is that you can see it as a disk in the file explorer, which maybe implies that the flexible data recovery option respects partitions? Is that correct, or does it also just look at it as a disk. The documentation is a little fuzzy on this because on the one hand it says the advantage of the flexible data recovery option is that you can actually mount the partition as a disk.

            • 3. Re: Adding Volume RAID 1 Drive with IRST
              allan_intel

              Flexible data protection allows you to determine how the recovery volume is updated, either continuously (the default) or on demand. Only half of the total drive capacity can be used for storage. Storage space may be wasted if the capacities of the primary and recovery hard drives are different.

               

              Allan.