Hello,   Presuming that the drive is a Dell branded 600GB in a PS4000 carrier, yes it will work.  Only 300GB of the 600GB drive will be used.   Regards, 
I have one failed disk in PS4000. Now I need to replace that disk, but is it possible to replace current failed disk with compatible but bigger disk?  See the attached picture. I use RAID 50 and all the disks are now 300GB except one spare disk which was replaced in this same situation earlier this year. Now I have a 600GB disk, is it ok to hot swap that? Or does it break the raid? [View:/cfs-file/__key/communityserver-discussions-components-files/3775/EQ_5F00_PS4000.pdf:550:0]
Equallogic PS4000 replacing failed disk with bigger disk