[Accepted] Create 2 GiB buffer space when adding a disk

Feature Requests
61

Are you really suggesting that this feature will make it into OpenZFS before GIMP 3 is finally released?

62

How about Half-Life 3?

1 Like
63

Thank god I only use mirror. This should be easy fix even if it happens to me :smiley:

1 Like
64

Back to reality.

Sun Microsystems dealt with this uneven sized disk problem by shrinking disks to a least common denominator. It is likely that all Enterprise computer and storage vendors do something similar.

I remember once when EMC could not get the exact replacement for a failing disk in one SAN Array. It was still supported so they HAD to make something work. Basically they had to go up one size in hard disk, and tell the SAN Array firmware to treat it like a smaller one.

To be precise, this uneven disk size applies to almost all RAID schemes. That is Linux software LVM & MD-RAID, probably BTRFS too, and likely all hardware based RAID. Now it does appear that UnRAID has a work aroundā€¦ but UnRAID was never classical RAID.

1 Like
65

Most hardware RAID has an option for making sure there is a buffer to deal with drive size variance, but itā€™s not the default in all cases.

For LSI, you have 3 options for drive size coercion:

  1. No buffer
  2. 128MB
  3. 1GB

Even 1GB isnā€™t enough to handle the difference in the 12TB Seagate drives.

3 Likes
66

This will be tracked here: Jira

68

Accepted ! Great News