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I am building a new (power) system. MOBO is a ASUS Sabertooth 990FX. I've installed:

  • 1 500GB HD for the OS and user accounts (mounted at /)
  • Three 2TB drive set up on the BIOS as a single raid0 (mounted at /raid)

The issues is that I cannot confirm the size of the raid from the mount point. When I look at the properties of /raid it tells me "free space: unknown". I am unsure of the output I'm getting from fdisk -l as this is my first foray into raid.

fdisk is inconclusive and "cat /proc/meminfo" appears to indicate that I'm not getting the memory I expect (see below!).

Any assistance will be greatly appreciated.

Bruce

*********** fdisk -l output:

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

Warning: invalid flag 0x0000 of partition table 5 will be corrected by w(rite)

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0009a55f

Device Boot Start End Blocks Id System /dev/sda1 384 3095388671 1547694144 fd Linux raid autodetect /dev/sda2 3095389054 3128815103 16713025 5 Extended

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000

Device Boot Start End Blocks Id System /dev/sdb1 1 3907029167 1953514583+ ee GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000

Device Boot Start End Blocks Id System /dev/sdc1 1 3907029167 1953514583+ ee GPT

Disk /dev/sdd: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000bc319

Device Boot Start End Blocks Id System /dev/sdd1 * 2152710 976768064 487307677+ 83 Linux /dev/sdd2 124 2152709 1076293 5 Extended /dev/sdd5 126 2152709 1076292 82 Linux swap / Solaris

Partition table entries are not in disk order

Disk /dev/mapper/pdc_beejhachf: 1602.0 GB, 1601953333248 bytes 255 heads, 63 sectors/track, 194759 cylinders, total 3128815104 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 65536 bytes / 196608 bytes Disk identifier: 0x0009a55f

                Device Boot      Start         End      Blocks   Id  System

/dev/mapper/pdc_beejhachf1 384 3095388671 1547694144 fd Linux raid autodetect /dev/mapper/pdc_beejhachf2 3095389054 3128815103 16713025 5 Extended Partition 2 does not start on physical sector boundary. /dev/mapper/pdc_beejhachf5 3095389056 3128815103 16713024 82 Linux swap / Solaris

Disk /dev/mapper/pdc_beejhachf1: 1584.8 GB, 1584838803456 bytes 255 heads, 63 sectors/track, 192679 cylinders, total 3095388288 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 65536 bytes / 196608 bytes Disk identifier: 0x00000000

Disk /dev/mapper/pdc_beejhachf1 doesn't contain a valid partition table

Disk /dev/mapper/pdc_beejhachf5: 17.1 GB, 17114136576 bytes 255 heads, 63 sectors/track, 2080 cylinders, total 33426048 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 65536 bytes / 196608 bytes Disk identifier: 0x00000000

Disk /dev/mapper/pdc_beejhachf5 doesn't contain a valid partition table

************ cat /proc/meminfo output MemTotal: 16405964 kB MemFree: 14722300 kB Buffers: 64496 kB Cached: 709308 kB SwapCached: 0 kB Active: 886560 kB Inactive: 391952 kB Active(anon): 505508 kB Inactive(anon): 712 kB Active(file): 381052 kB Inactive(file): 391240 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 16713020 kB SwapFree: 16713020 kB Dirty: 552 kB Writeback: 388 kB AnonPages: 504664 kB Mapped: 197904 kB Shmem: 1512 kB Slab: 96652 kB SReclaimable: 72460 kB SUnreclaim: 24192 kB KernelStack: 2904 kB PageTables: 21804 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 24916000 kB Committed_AS: 2080264 kB VmallocTotal: 34359738367 kB VmallocUsed: 334800 kB VmallocChunk: 34359391644 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 138240 kB DirectMap2M: 4005888 kB DirectMap1G: 12582912 kB

************** grep MemTotal /proc/meminfo output MemTotal: 16405964 kB

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1 Answer 1

You have Fake RAID.

Rule of thumb is that unless you spent hundreds of dollars on a RAID device, you don't have hardware RAID. In many situations, software RAID is preferable to hardware RAID, so that's not a problem. However, you'd probably be happier with real linux software raid (md)

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Okay, so the basic steps involved would be? (1) Remove raid setting from bios (2) use rmraid to set up the software raid? –  Bruce W. Ford Dec 24 '11 at 15:10
    
use mdadm to set up software raid. This can also be done from the alternate CD's installer. –  tumbleweed Dec 24 '11 at 15:37
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