We have come up against the 16TB size lmit for a LUN in Ontap 8.3.1. The LUN is on a volume that has been grown to 23.04 TB, yet the LUN is only 16 TB. There are no other LUNs on the volume, yet the vol is 100% full. What is using this extra space on the volume? What is "Reserved Space for Overwrites" and why is it 6.45TB?
There are no snapshots on the volume and a 5% snapshot reserve.
How can we reclaim this 7+TB of space on the volume?
lun show:
/vol/VMDK_01/VMDK_01 online mapped vmware 15.97TB
vol show:
VMDK_01 netapp_clr301_01_aggr1
online RW 23.04TB 0B 100%
vol show detail:
netapp-clr301::> vol show -vserver netapp-iscsi301 -volume VMDK_01
Vserver Name: netapp-iscsi301
Volume Name: VMDK_01
Aggregate Name: netapp_clr301_01_aggr1
Volume Size: 23.04TB
Volume Data Set ID: 1100
Volume Master Data Set ID: 2147484748
Volume State: online
Volume Type: RW
Volume Style: flex
Is Cluster-Mode Volume: true
Is Constituent Volume: false
Export Policy: default
User ID: 0
Group ID: 0
Security Style: unix
UNIX Permissions: ---rwxr-xr-x
Junction Path: -
Junction Path Source: -
Junction Active: -
Junction Parent Volume: -
Comment:
Available Size: 0B
Filesystem Size: 23.04TB
Total User-Visible Size: 21.89TB
Used Size: 21.89TB
Used Percentage: 100%
Volume Nearly Full Threshold Percent: 95%
Volume Full Threshold Percent: 98%
Maximum Autosize (for flexvols only): 30TB
(DEPRECATED)-Autosize Increment (for flexvols only): 1GB
Minimum Autosize: 23.04TB
Autosize Grow Threshold Percentage: 98%
Autosize Shrink Threshold Percentage: 50%
Autosize Mode: off
Autosize Enabled (for flexvols only): false
Total Files (for user-visible data): 31876689
Files Used (for user-visible data): 101
Space Guarantee Style: volume
Space Guarantee in Effect: true
Snapshot Directory Access Enabled: true
Space Reserved for Snapshot Copies: 5%
Snapshot Reserve Used: 0%
Snapshot Policy: none
Creation Time: Fri May 20 14:22:19 2016
Language: C.UTF-8
Clone Volume: false
Node name: netapp-clr301-01
NVFAIL Option: on
Volume's NVFAIL State: false
Force NVFAIL on MetroCluster Switchover: off
Is File System Size Fixed: false
Extent Option: off
Reserved Space for Overwrites: 6.45TB
Fractional Reserve: 100%
Primary Space Management Strategy: volume_grow
Read Reallocation Option: off
Inconsistency in the File System: false
Is Volume Quiesced (On-Disk): false
Is Volume Quiesced (In-Memory): false
Volume Contains Shared or Compressed Data: true
Space Saved by Storage Efficiency: 660.4GB
Percentage Saved by Storage Efficiency: 3%
Space Saved by Deduplication: 660.4GB
Percentage Saved by Deduplication: 3%
Space Shared by Deduplication: 72.02GB
Space Saved by Compression: 0B
Percentage Space Saved by Compression: 0%
Volume Size Used by Snapshot Copies: 0B
Block Type: 64-bit
Is Volume Moving: false
Flash Pool Caching Eligibility: read-write
Flash Pool Write Caching Ineligibility Reason: -
Managed By Storage Service: -
Create Namespace Mirror Constituents For SnapDiff Use: -
Constituent Volume Role: -
QoS Policy Group Name: -
Caching Policy Name: -
Is Volume Move in Cutover Phase: false
Number of Snapshot Copies in the Volume: 0
VBN_BAD may be present in the active filesystem: false
Is Volume on a hybrid aggregate: false
Total Physical Used Size: 5.87TB
Physical Used Percentage: 25%