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20TB Server Hard Drives

Key takeaways

  • 210 listings match this collection right now.
  • At 20TB a single-parity RAID rebuild takes long enough that the array stays exposed to a second failure, which is why dual-parity RAID or erasure coding is the safer choice.
  • A dense chassis filled with 20TB drives draws more inrush current at spin-up than the same chassis with smaller drives, so a JBOD at this capacity may need staggered spin-up.
  • This capacity is a 4Kn or 512e nearline part built for capacity tiers, and the sector format has to match the array; no 10K or 15K drive reaches 20TB.

20TB is the current high-capacity point for 3.5-inch enterprise drives, in 12Gb/s SAS and 6Gb/s SATA. These are 4Kn or 512e helium drives for capacity tiers, not performance tiers.

210 listings in this collection, filtered from Server Hard Drives. The part number and manufacturer are stated on every listing, and the condition wherever the catalogue records one. For quantity, request a volume quote.

Items 1-12 of 210

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How to choose server hard drives

Match the interface and link rate the controller or backplane presents, the bay width (2.5-inch or 3.5-inch), and the rotational class already in the array: 10K and 15K drives for latency-sensitive duty, 7200 RPM nearline drives for capacity. Replacing an array member also means matching capacity and sector format, or the controller can reject the drive.

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