January 11, 201412 yr Hi, i use a server with 1,5tb hdd only. Now i exand my server and bought a new 4 tb hdd for the parrity My mainboard is a older mainboard but it should handle 4tb hdd. After switching parrity disc and booting the server, unraid shows me a 4 tb and i assign the hdd to the parrity slot. After starting array unraid told me the a paarity rebuild / sync is starting and the time is 1200 minutes. This is a normal time for my unraid hardware , before with 1,5 tb hdd i have a time of about 600 minutes. After about 550 minutes unraid spin down all data hdd and after about 900 minutes unraid wrote in log file: Jan 11 05:35:15 Server kernel: md: sync done. time=50087sec Jan 11 05:35:15 Server kernel: md: recovery thread sync completion status: 0 Jan 11 05:50:21 Server kernel: mdcmd (62): spindown 0 i dont know now if unraid use the complete 4 tb disc space now or only 2.2tb because the check should have longer ? I hope you understand want i mean. A logfile is attached Unraid os is 5.0 syslog-2014-01-11.txt
January 11, 201412 yr If the WebGUI shows the parity drive is 4TB, then you're fine ... it's using it all.
January 11, 201412 yr If your parity drive is the only 4TB drive in your system, it doesn't need to go 'all the way', checking is completed when the size of your largest data drive is reached.
January 11, 201412 yr If your parity drive is the only 4TB drive in your system, it doesn't need to go 'all the way', checking is completed when the size of your largest data drive is reached. yes, but if all your data drives are 2TB and your parity is 4TB it sill still "check" the last 2TB on the parity, which is why the delay between spindown and the parity checking completing.
January 11, 201412 yr If your parity drive is the only 4TB drive in your system, it doesn't need to go 'all the way', checking is completed when the size of your largest data drive is reached. Actually that's not true. A parity check will still go to the end of the drive -- in this case confirming that the rest of the parity drive is all zeroes (since UnRAID uses even parity).
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