hi. need a little help here. i am new in unraid

 

i have a new setup of unraid 6.9.2 built from used and old computer (i5-4570 cpu and 4 GB ram). the disk that i used for the array is :

2 x 1 tb wd blue disks

1 x 2 tb seagate barracuda disk

2 x 4 tb wd red disk

 

i am planning to change the configuration of the disk so my setup will have 8 TB data disk space ( 2 x 1 tb wd blue disks, 1 x 2 tb seagate barracuda disk and 1 x 4 tb wd red disk) with 1 x 4 tb wd red as parity disk.

if one of my data disk fail, is my data safe? can i rebuild the data again after change the failed disk only? 

what will happen if my parity disk fail?

 

thank you for the answer/s. forgive me for my broken english.

Edited April 5, 20224 yr by onggio

11 minutes ago, onggio said:

y data disk fail, is my data safe? can i rebuild the data again after change the failed disk only? 

if your parity is still valid, you just pull out the failing drive, stop the array, plug in a new drive (which cannot be bigger than the parity drive! else things will become more complicated) and assign the new one to the now blank spot of the array. When starting the array again, rebuild will start automatically.

13 minutes ago, onggio said:

what will happen if my parity disk fail?

nothing, your data is still there and accessible, just not protectd anymore. So you pull out the failed parity drive, buy a new one (hint: buy a bigger and faster one!) and assign it to the parity slot. When starting the array again, the new parity drive will be filled with valid parity data again (which takes quite a long time, you wont do this for a hobby each day 🙂 )

 

Hint2: overall speed of the array is limited to the speed of the parity drive. So consider to buy a BIGGER and FASTER one. Your WD-Red are slow as a dog, you will notice this very soon. WD-Red-PRO is ok.

 

2 hours ago, Michael Meiszl said:

Hint2: overall speed of the array is limited to the speed of the parity drive. So consider to buy a BIGGER and FASTER one. Your WD-Red are slow as a dog, you will notice this very soon. WD-Red-PRO is ok.

 

thanks for the hint. i think i will purchase the wd black hdd near in the future for the next upgrade because the price of wd red pro is quite high. 

 

how about the usb drive? is it safe for me to add some external drive to the system for the data drive? because the old tower that i used for the NAS, the sata ports are quite limited and the PSU are quite low.

1 minute ago, onggio said:

thanks for the hint. i think i will purchase the wd black hdd near in the future for the next upgrade because the price of wd red pro is quite high. 

 

how about the usb drive? is it safe for me to add some external drive to the system for the data drive? because the old tower that i used for the NAS, the sata ports are quite limited and the PSU are quite low.

Wd Black is not a good idea too... she wont survive for long in a 24/7 environment. Its a pure desktop drive meant to work from 9to5 only.

 

USB Drives are also a big risk.  You can read here that they often lose connection, normally this would not be a real problem, but UNRaid may kick them out instantly and mark them as "bad". You will have to start over then an do the long way to regenerate. Better buy an cheap 4xsata controller and put it into an empty slot