2 1TB SSDs or 1 2TB SSD for Hyper-V guests

Discussion in 'SSDs & Data Storage' started by rpeters83, Jul 3, 2019.

  1. rpeters83

    rpeters83 Limp Gawd

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    I run a small Hyper-V host (using a desktop PC) and currently have two 1TB WD blacks but want to replace them with SSD storage. Each drive contains about 5-8 guests (about 10-16 total, though 12 on average).

    I am torn between upgrading to 2 1TB SSDs or 1 2TB SSD. The the former, I don't lose any performance. With the latter, i don't know if performance will not be optimal (putting all guests on one drive instead of spanned across two), but I gain a slot for an extra drive if I need it in the future.

    Thoughts on performance between the two options?
     
  2. Kardonxt

    Kardonxt 2[H]4U

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    I think it really depends on workloads. We have some clients running ~30 user (basic office users email, word, etc. ) RDS servers off one SSD with pretty snappy performance. Obviously if your guests are doing anything throughput intensive you may not have such good luck.
     
  3. Maxx

    Maxx [H]ard|Gawd

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    If you're thinking 2TB NVMe (some E12-based drives have been ~$220 there recently) then it will be more than adequate.
     
  4. Vengance_01

    Vengance_01 [H]ardness Supreme

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    I would split the VMs between 2 1TBs SSD
     
  5. rpeters83

    rpeters83 Limp Gawd

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    Thanks. Could you explain your reasoning?
     
  6. SamirD

    SamirD 2[H]4U

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    I would go for the 2x1TB for a couple of reasons:
    • Cost - 2TB drives still command a premium so 1TB drives will be cheaper
    • Performance - when accessing data that is on 2 different 1TB drives, each drive's full bandwidth is available
    • Safety - if one drive fails, you only have to replace the one and aren't completely down
     
  7. rpeters83

    rpeters83 Limp Gawd

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    All good points. I'll order two. Thank you.
     
    SamirD likes this.
  8. kdh

    kdh Gawd

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    Split work loads between 2 drives. Each drive is capable up to a certain amount of iops. If you have 2 drives, you effectively double the amount of iops you can push.