os6 on ultra 4

I used a Ultra 4 for a week or more with zero issues. Not that I beat on these things... loaded 2TB or so of data and served a few files. Also used iSCSI (rather heavily). Worked like a champ.

If you follow the three steps (per the post) it couldn't be easier.

viewtopic.php?f=160&t=70133

AS POSTED YOU'LL LOSE YOUR DATA DURING THE UPGRADE PROCESS

Working fine here. Had some issues with external USB drives but haven't had the time to test it in detail yet

Installed 6.1.8 on my Ultra 4+ with no issues. Updated to 6.1.9 and it corrupted the boot partition about a week later after a bad shutdown. Data was OK, but the unit wouldn't boot. Was able to recovery boot and pull data off, then wipe and restore to 6.1.9.

I'm a little wary of updating to 6.2.0 but it's got some nice features.

I've had no major issues either. The only issue I had was that the sync failed when I put in an additional drive. Pulled it out and put it back in, and it was happy.

I've been running 6.2.0 since it was released and it's by far the most stable OS 6 update they've put out so far...

I do a lot of customer backups so the private time machine feature is great for me! So far have an uptime of 24 days and have uploaded 4.3TB's of data to crashplan, received over 750GB's of data over the wan link (customer's encrypted backups) and on the lan side I've done around 3.4TB's received and 2.8TB's sent (the thing is always doing something!)

I do have a beefed up box though, with a Q6600 processor and 8GB's of ram running 6 4TB drives. Want to upgrade to either 6TB drives or eventually 8TB drives... probably will wait until the thing is nearly fully and then determine what to upgrade to at that particular time.

What is the performance difference between os6 and os4 on ultra 4?

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Well that depends on various factors including how you configure the unit, what apps you install, what apps and services you run etc.

If you try OS6 I would suggest running 6.2 once that is available.

You can go back to OS4 if you don't like OS6 though the downgrade also requires a factory default (wipes all data, settings, everything).

I have a Ultra 4 Plus and will be taking the big jump this holiday weekend since I found a 3TB drive to store the backup on. I am currently on 4.2.27 firmware. Do I need to downgrade back down to 4.2.26?

My understanding these are the steps

1. BACKUP, BACKUP, BACKUP
2. Download 6.0.X package from NTGR
3. Edit the latest IMG for instalation by 4.2 Frontview
3. Install via 4.2.x menu
4. Reboot
5. Factory Default the system

I plan on using the modified image R4toR6_latest.bin with Prep4ToR6_0.1-x86.bin for step 3 (I install the prep then R4toR6 without rebooting in between installing the bin file. Is this correct?)

My question can I use the new 6.2 image in step 3 or do I need to modified it or upgrade to 6.2 once in install R4toR6_latest.bin image

Install the prep add-on then the R4 to R6 latest image. If you downloaded that since the global announcement on 6.2 was made then it would be one that will update you direct to 6.2

You can go direct from 4.2.27 to 6.2.0

If you install the prep add-on it should do a factory default automatically at the appropriate point in the upgrade process.