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DD6300 upgraded from 7 to 12 disks. Additional five disks added to the Active Tier using #storage add . #filesys expand reports only 2.18 TiB available for expansion. The expected capacity increase is approximately 11 TiB (from ~14.5 TiB to ~24 TiB). No DDOS patch available; issue confirmed and workaround provided. Affected systems: DD6300 (all DDOS versions). Other All-in-One systems may encounter similar behavior if cache tier disks are present in the head/controller unit.
DDOS incorrectly calculates expandable capacity by scanning for the smallest partition ( ppart ) across all disks in the head unit. In DD6300 systems, this is often the SSD used for the cache tier, with a ppart size of 745.22 GiB . The system then calculates usable capacity based on this smallest partition: Three data disks (5 minus 2 parity) × 745.22 GiB = 2235.66 GiB 2235.66 GiB ÷ 1024 = 2.18 TiB This value is incorrectly presented as the maximum expandable capacity.
This is a false capacity report . The system expands correctly despite the misleading message. Workaround: Confirm that the five new disks are added to the Active Tier and show as SPARE in #disk show state . Proceed with #filesys expand and accept the prompt despite the 2.18 TiB message. Filesystem is expanded to the correct total capacity (~23.87 TiB). Example scenario and CLI Output: 1.) The extra five disks are installed and presented as 'Unknown' status, as expected, with #disk show state : 2.) Disks are successfully added to the Active Tier using #storage add disks 1.8 1.9 1.10 1.11 1.12 tier active The 5x new disks have a SPARE status: sysadmin@systemname# disk show state Enclosure Disk 1 2 3 4 5 6 7 8 9 10 11 12 13 14 --------- ------------------------------------------- 1 . . . s . . . s s s s s . . --------- ------------------------------------------- 3.) The final step ( #filesys expand ) reports that the Filesys capacity is increased by only 2.18TiB (instead of an expected ~11TiB) : sysadmin@systemname# filesys expand The filesystem will be expanded approximately by 2.18 TiB. Are you sure? (yes|no) [no]: yesok, proceeding.########################################### [100%] The approximate size of the filesystem is 23.87 TiB. sysadmin@systemname#
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