Hi Aya,  OneFS 6.0.5  release notes page 8 mention IOS 6.0.5.3 image is the only OneFS installation image which can be download in the FTP server for OneFS 6.0.5 version. Meanwhile, Isilon OneFS 7.0.2.10 MR Release Notes page 3 say that simultaneous upgrade are supported from OneFS 6.0.5 to OneFS 7.0.2.10. So I think 6.0.5.3 is supported to upgrade to 7.0.2.10.
Hi there ,,  I found [URL] and 6.0 can be upgrade to 6.5 /7.0 in Page5 simultaneous upgrade Option.  But found [URL] Page3 ,Simultaneous upgrades to OneFS 7.0.2.10 are supported from the following OneFS --> OneFS 6.0 - OneFS 6.0.5  The version my customer is on is 6.0.5.3.... should we consider minor version for upgrade compach? Basically .. can we upgrade 6.0.5.3--> 7.0 ? 
minor version upgrade ....