mdadm

  1. S

    MDADM RAID6 - unstable behavior

    Hello, I have a big fat server with 22 * 15.36TB Micron 9300 Pro SSDs connected directly to the motherboard via PCIe lines. I have setup a RAID6 configuration without any write caching, getting an array of about 307,2 TB. On top of the array I have a big fat MySQL instance and what I have...
  2. F

    mdadm raid5 recovery

    TL,DR; I might've messed up huge, I need someone's help who knows mdadm better than I. I can provide any sort of data, but this crazy long story will get you up to par, if you care to read it. I'm at a loss and worried. Okay, I'm not even sure where to start with this post. the short of...
  3. MrCalvin

    EXT4 optimization (Journal, checksum, QEMU, LVM, MDADM)

    I've decide to use mdadm RAID1(root) and RAID5(data) on my servers and my final choice of filesystem was EXT4 for both (did consider btrfs, XFS and ZFS, but looking at all pros/cons I ended up with EXT4). I've started wondering about a few things in regards to performance optimizing: Twice...
  4. P

    Raid5 grow time

    Hi, I have a Rackmount with a LSI-9011-8i. Now I have 2x8TB drives (one of these full) and I'm planning to buy another 4 of these drives (WD80EFAX) to build a RAID-5 with mdadm. (Now the 2 drives are NOT in RAID) If I create a RAID-5 with the new 4x8TB drives, how long will it take to grow, if I...
  5. AveryFreeman

    FreeBSD/FreeNAS vs OmniOS/Napp-it write speeds when used as ESXi NFS VM datastore?

    Hey, so I've done a couple all-in-one ESXi boxes with either FreeNAS or FreeBSD with ZFS I pass to ESXi as NFS datastores. Tried to run VMs but benchmarks exposed gawd-awful write speeds, totally unusable. Just ended up using them for ISO storage and (slow) backups, content libraries, etc...
  6. D

    Performance LSI 9205-8e ssd raid0

    Hi all.. I have 8 ssd's (Toshiba Trion OCZ 150 480gb) hooked up to an 9205-8e with 2 SFF 8088 to 4 X SATA cables. It's sitting in an HP Z800 (96gm ram) running proxmox (latest v4.xx). The lsi is placed in an 8x pcie 2.0 port I have made two raid0 arrays (four ssd's in each) with mdadm and i...
  7. fossxplorer

    Bad mdraid0 performance

    I'm wondering why i get such low numbers from my mdraid0 RAID setup. I've setup 2 mdraid0 of 2x SSD partitions and both perform like a single SSD when it comes to IOPS, but better with seq. read. Here are some numbers: First RAID0 of 2x Intel S3700 400GB, using only 100GiB partitions for...