Khkris, All the timestamps themselves on files and folders are actually recorded in Unix EPOCH time, and then converted based on the timezone in question.  So no, changing the timezone shouldn't have any effect besides perhaps changing when the next SyncIQ or SnapshotIQ scheduled jobs might run, since if they are set at say 10:00PM that is in whatever timezone the cluster is in, if at 9:50PM you change the timezone forward an hour, now it's 10:50PM, and 10:00PM never happened, make sense?  But then again this isn't something that anybody does on a frequent basis, so the impact should be very low.  No disconnected clients or anything.  isi02-1# isi_for_array date isi02-1: Fri Feb  6 15:21:39 EST 2015 isi02-2: Fri Feb  6 15:21:39 EST 2015 isi02-3: Fri Feb  6 15:21:39 EST 2015   isi02-1# isi config Welcome to the Isilon IQ configuration console. Copyright (c) 2001-2014 EMC Corporation. All Rights Reserved. Enter 'help' to see list of available commands. Enter 'help ' to see help for a specific command. Enter 'quit' at any prompt to discard changes and exit.           Node build: Isilon OneFS v7.1.1.1 B_7_1_1_84(RELEASE)         Node serial number: SX200-301118-0104   isi02 >>> time   The current time zone is: Eastern Time Zone   isi02 >>> time Central Time Zone   Time zone is set to Central Time Zone isi02 >>> commit   Commit succeeded. isi02-1# isi_for_array "date" isi02-1: Fri Feb  6 14:19:49 CST 2015 isi02-2: Fri Feb  6 14:19:49 CST 2015 isi02-3: Fri Feb  6 14:19:49 CST 2015  Hope this helps, Chris Klosterman Senior Solution Architect, EMC Isilon O&E Team chris.klosterman[NAME].com twitter[NAME]
Could any one please suggest how to modify cluster time zone via  CLI/GUI ?  Is there any impact if we update timezones from one to another?
Modify Cluster Time Zone