Hi, I've just put together a new server, precleared 3 drives (2 x 3TB, 1 x 4TB), and assigned the drives with the 4TB as parity. However, whilst doing the initial parity rebuild myMain was reporting a potential HPA due to detecting a 'non-standard drive size' (whilst the rebuild was ongoing it was also reporting an invalid size, but that looks to have been something to do with the rebuild process as that's gone now). The parity drive (+the two others) show as green in the unRaid main view. 

 

The motherboard is the ASRock 880GM-LE-FX, which as far as I'm aware doesn't have this HPA issue; the drive is a 4TB 7200rpm DeskStar. There's nothing in the syslog about an HPA, and I've run the 'hdparm -N /dev/[hs]d[a-z]' command, which reports no HPA (7814037168/7814037168 max sectors), so is this just myMain not properly recognising a 4TB drive? The OS is the current rc11.

 

(all three drives are showing a smaller number of bytes in the unRaid main view than they were reporting to preclear, but I assume this is a consequence of the formatting?)

 

Thanks,

 

 

This is purely from reading posts by Joe, I've never really looked into this or how unraid 'detects' HPA but:-

 

I'm pretty sure 4TB HDDs are marked as HPA due to the fact their size modulo well with whatever unraid uses to detect HPA. My SSD cache drive has the exact same issue (And I have no idea how to tell it to stop warning me, I have to mark HPA_VALID as 1, but, no idea how to do that.).

 

Once again, I may be completely wrong, this info was based off one post by Joe I read ~ 5 days ago.

Mymain has not been updated to include 4TB drives in its list of sizes. Odd size drives not on the list will be flagged for further attention.

Perfect, thank you (now I just need to find out the same thing, where to set the hpa_ok attribute :-))

 

 

Perfect, thank you (now I just need to find out the same thing, where to set the hpa_ok attribute :-))

http://lime-technology.com/forum/index.php?topic=14194.msg134248;topicseen#msg134248

Perfect, thank you (now I just need to find out the same thing, where to set the hpa_ok attribute :-))

/boot/unmenu/myMain.conf if you want to hack the source. Or do like Joe said and specifically opt out that drive from the warning. Changing myMain.conf is not recommended if you don't know what you are doing, or if you can't accept the possible consequences.

Well, I definitely don't know what I'm doing, but setting the parameter for that drive as per the link above solves the problem, so all good :-).

 

Thanks for the help...