Symptoms

New shelves are added to the system. After running "filesys expand", the File system size is incorrect.

Cause

This behavior is due to an issue with Physical Extent Manager (PEM).When an enclosure is added post FS creation, the PEM module fails to identify the next RAID array number to be created on newly added enclosure. It ends up expanding only existing arrays. It does not create new RAID arrays to meet the capacity. Example:In the example below, after running filesys expand, the active tier size should increase to 94.5 TiB. However, after the command is run, the new FS size is 56.6 TiB.1) FS expansion on HU and with 1 ES40 Capacity licenses: Feature Shelf Model Capacity Type State Expiration Date Note ------------------ --------------- ---------- --------------- ------ ----------- 1 CAPACITY-ACTIVE PROTECTION_POOL 94.58 TiB permanent (int) active n/a 2 CLOUDTIER-CAPACITY n/a 181.89 TiB permanent (int) active n/a ------------------ --------------- ---------- --------------- ------ ----------- !!!! localhost YOUR DATA IS IN DANGER !!!! # ddsh -s disk show state Tue May 3 18:07:46 PDT 2022 Enclosure Disk 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 --------- ---------------------------------------------- 1 . . . . . . . . . . . . 2 v v v v v v v v v v v v v v v --------- ---------------------------------------------- Legend State Count ------ --------------- ----- . In Use Disks 12 v Available Disks 15 ------ --------------- ----- Total 27 disks !!!! localhost YOUR DATA IS IN DANGER !!!! # ddsh -s filesys expand !!!! localhost YOUR DATA IS IN DANGER !!!! ddsh -s disk show state; ddsh -s filesys show space; ddsh -s storage show all Enclosure Disk 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 --------- ---------------------------------------------- 1 . . . . . . . . . . . . 2 . . . . . . . . . . . . . . . --------- ---------------------------------------------- Legend State Count ------ ------------ ----- . In Use Disks 27 ------ ------------ ----- Total 27 disks Active Tier: Resource Size GiB Used GiB Avail GiB Use% Cleanable GiB ---------------- -------- -------- --------- ---- ------------- /data: pre-comp - 0.0 - - - /data: post-comp 56911.7 0.1 56911.7 0% 0.0 /ddvar 78.6 4.6 70.0 6% - /ddvar/core 251.9 0.1 239.0 0% - ---------------- -------- -------- --------- ---- ------------- The Active tier can be expanded by 37.92 TiB. Active tier details: Current active tier size: 56.6 TiB Storage available to the active tier: 39.2 TiB Active tier maximum capacity: 156.4 TiB Cache tier details: Current cache tier size: 3.2 TiB Storage available to the cache tier: 0.0 TiB Cloud tier details: Current cloud tier metadata size: 21.7 TiB Storage available to the cloud tier: 0.0 TiB Shelf Capacity License: License Model Total Used Remaining --------------- --------------- -------- -------- --------- CAPACITY-ACTIVE PROTECTION_POOL 94.5 TiB 56.3 TiB 38.1 TiB --------------- --------------- -------- -------- --------- The active tier size may be slightly larger than the licensed amount.

Resolution

Resolution:This issue has been fixed in DDOS 7.7.3.0-1010549, DDOS-7.10.0.0 and later. The fix corrects the code error and correctly identifies the next RAID array number to be created on newly added enclosure drives.Workaround: If you are planning to expand, upgrade to the fixed version, and then run expand. If you are carrying out a partial expansion and you upgrade to a fixed release, the next FS expand will autocorrect the expanded size.

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