Hello Jenny,   Yes running MKFS is very destructive.  Since the volume is on the EQL array and not under VMware control you would have needed an EQL snapshot to recover.  Which can be done with HIT/LE.   The newest HIT/LE v1.6.0 supports RHEL v7.3 which as I suspected was causing the issues you were seeing.  HIT/LE v1.6.0 will work with older firmware.  That firmware is old enough to not have been certified with the newer build of HIT/LE.    There are many good reasons to upgrade the EQL array firmware so that's something else to consider long term.  Dell / EQL support doesn't have data recovery services.   There are some other 3rd party companies that have worked with Dell/EQL that might be able to assist you,   Regards,  Don    
I am newbie to Dell EqualLogic Host Integration Tools for linux. So hope to get some help here. We recently upgrade our RHEL from 5 to 7.3. After the upgrade, I re-install the HIT and  Logging into a Volume with Multipath I/O. it's all fine.  # ehcmcli login --login-at-boot --target iqn-name --portal 10.10.10.10 I can see the volume after login. I also setup so it will automatic login at boot, but once I reboot the server, that volume is gone. # ehcmcli login --target target [--portal portal] --login-at-boot I also so confused with the LVM and HIT. The redhat support person said we are using HIT metadata for the volume instead of LVM so they won't be able to help us, But I don't understand the logic between HIT and LVM. After I login the volume and I can see it through #ehcmcli status. I was hoping to mount that volume to a directory. seems not working , once I reboot that volume is gone. Do I need to create physical volume and logical volume? Is it necessary?  Thanks a lot for the help.    
After upgrade from RHEL 5 to 7.3, volume list won't stay