![]() Write Same is enabled by default on all FreeNAS iSCSI LUNS By using the Write Same primitive, the ESXi host simply tells the storage array how much zeroes it should write. This would significantly shorten the time needed. The ESXi host has to write gigabytes of zeroes to the storage array which takes some time. When an eager-zeroed virtual disk is created, the entire space gets zeroed. MBC_WR/s - Current magabytes per second written.MBC_RD/s - Current megabytes per second read.Clone_F - Total number of failed CXOPY commands.Clone_WR - Total number of writes offloaded.Clone_RD - Total number of reads offloaded.A Virtual Machine was migrated with Storage DRS while the screenshot was taken. This will enable Device mode and all required fields. Verify XCOPY operations with esxtop. Press u f f g i o in esxtop. Verify XCOPY support with esxcli storage core device vaai status get esxcli storage core device vaai status get -d naa.6589cfc0000006948963c2aa5057083f XCOPY is enabled by default on all FreeNAS iSCSI LUNS This does not waste ESXi Host resources such as CPU cycles, DMA buffers and SCSI commands in the HBA queue. The XCOPY primitive allows to offload these requests to the storage array. Without VAAI clone and Storage vMotion operations are performed by the VMkernel. ![]() ATSF - Total number of failed ATS commands.Verify ATS operations with esxtop. Press u f f g i o in esxtop. Verify ATS support with esxcli storage core device vaai status get esxcli storage core device vaai status get -d naa.6589cfc0000006948963c2aa5057083f A SCSI reservation locks a datastore and prevents all other hosts from doing metadata updates on that datastore.ĪTS is enabled by default on all FreeNAS iSCSI LUNS Thin Provisioning Space Threshold WarningĪtomic Test & Set (ATS / Hardware Accelerated Locking)ĪTS is a storage based locking mechanism to replace SCSI reservations on VMFS volumes when doing metadata updates.Dead Space Reclamation (Delete / UNMAP).Atomic Test & Set (ATS / Hardware Accelerated Locking).Is it possible to mount an NTFS formatted zvol directly to the FreeNAS (eg using some form of mount or ntfs_mount command?), if so what command could I use? I know on Linux I'd use something similar to 'mount -t ntfs /dev/mapper/xxx /mnt/xxx' however I'm not too familiar with FreeBSD or zvols under the hood.Ģ.FreeNAS 9.3 now fully supports all 7 VAAI (vStorage APIs for Array Integration) block primitives: img file of the zvol which isn't practical in my case due to the data size: ġ. I've found another thread here which outlines a similar case, however the solution in that case was to create a. I am wondering given the zvol is formatted as NTFS inside, could I mount this on the FreeNAS directly and then move the files to my dataset using mv, then perhaps re-apply permissions on the dataset within the FreeNAS GUI to fix up any permissions that may or may not have been migrated from the file copy. I have around 150TB to move in total so this would take a large amount of time. I have migrated other smaller LUNs using a Windows Server, however the process is fairly slow and I'm seeing only about 30MB/s on average. Following one of my other posts regarding iSCSI performance issues, I'm now looking for a faster way to migrate my data from an NTFS formatted iSCSI zvol extent to a ZFS dataset.
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