TrueNAS Bunker-DIY DAS is now at more than 100TB - 1372 

Thanks for the info!

Okay,, I know that 3.5" is available in >2.4TB But 2.5" use to be only available in =< 2.4TB

Hi @skynetcybersystem3tech Thank You very much! glad you liked the video :-) Thank you for watching! :-)

Glad you like it

Well I have 25 year old Raid controllers that can add a drive to an array. I was really disappointed, when I found out that ZFS can't do that. Software,, you can do anything! but not that? If I had put 40TB of data on my DAS, and wanted to expand it on ZFS to 70TB,, I would have to copy everything off, and remake it.

@@MyPlayHouse Yes, again, these old controllers can do that, because they are not locked by this additional functionality that makes ZFS way better than hardware raid or simple software raid solutions such as the one used by Synology, but ZFS therefore comes with that single downside only. Having said that, you can OF COURSE, as I described above, add drives to your liking to existing pools WITHOUT copying data off of it, creating new and copying it back up: You simply add the drives to the system, then click storage (this might be a bit different as I am using TrueNAS Scale, but the functions stay the same) and scroll to the pool you want to expand, click "Manage Disks", select the new disks and add them to the pool you want to expand. Then you go back to Storage and click "Manage Devices". In there you click "Add VDEV" in which you select the new disks and add them to a new VDEV that is the same type as the existing VDEV you want to expand and click enter. TADA! If the available storage on the pool is not automatically updated you just click "Expand" and confirm you want to expand the pool size to all that is available. Done. (No waiting time, no risk of losing a disk during the sync process, no nothing) If your original VDEV is e.g. a RaidZ1 with 5 disks and the additional VDEV is a RaidZ1 with only 3 disks, he will warn you that this change will come at the cost of performance, because he will obviously leverage what goes where as per available free disk space, and if it goes to the VDEV with 3 disks, this will be slower than the other one, but he will still let you add it. I really don't see a problem there. If you want the filesystem to tolerate not replacing, but adding or removing disks from an existing VDEV, you have to live with these crappy old "Raid functionalities" that your raid controllers give you that are "hardware and problem unaware". Namely, if you run a raid 5 on your hardware raid controller and a disk dies, he will be able to reconstruct the data from the existing disks. If however the disks are all healthy, but one single bit is flipped somewhere and he realizes that during a scrub, he will not be able to correct the error, because he does not know on which disk the error happened. If things go wrong, you might lose files or even an entire array due to that exact problem. This and a lot more is absolutely no topic for ZFS, which has "multiple dimensions" of redundancy built in. Obviously, due to that huge gain in data protection, you lose the ability to add single disks, but can only add them as part of a new VDEV, which is a small price if you ask me =)

I hope you got your dose :-)

We have like a whole ton of HPE ProLiant G10 and Dell PowerEdge servers. All running ESXI :-)

Hi @LeeZhiWei8219 Thank You very much! glad you liked the video :-) Thank you for watching! :-)

Hi @ramfrancisuk Thank You very much! glad you liked the video :-) Thank you for watching! :-)

I have three big Rack DAS's,, this project is to make my own.

Hi @highflowhighflow9896 Thank You very much! glad you liked the video :-) Thank you for watching! :-)

Name them with the last 4 or 5 numbers of the serial number bay device numbers might not always match on the number in truenas, scale and core also displays them differently like sda and da1 on scale my boot drive seems to move between last letter and first letter sda and sdh at boot time, core seems to stay as da1 and 2 After using scale for a bit I don't like that it lacks any io relating to latency (just has busy and rw speed, temperature) I am also starting to appreciate SAS drives especially HP and Dell (I haven't tried any others yet to see if they do a background drive scan every 24 hours or at power up, like my dell Toshiba 600gb drives do) If you wanting to pre test a drive use clean all or zero fill in truenas, this writes Zeros from Start to end to makes sure 99.99% of the drive is working (obviously this is time consuming) if your using sata hdds recommend scheduling a monthly smart extended/long scan, if your using sas this isn't usually needed as they run there own backgrounds and it's does slow down the whole array (you can see the progress/status of scans under smartctl -x /dev/ usually you do -a but the background section isn't shown when using -a) Also branded (dell/hp) sas drives usually have drive write cache off by default (as it's expected to be used under hardware raid) if you pass -s wcache,on (you can save this on each drive tab in truenas under smart options) this can significantly incresses write performance (if this a sata drive drive write cache is usually default on)

I do not use it often,, but this tiny task I know :-)

Hi @VioletDragonsProjects Thank You very much! glad you liked the video :-) Thank you for watching! :-)

Okay,, I do only run my RS1219+ with 4 disks,, all the time,, the others I boot up, when needed.

I would need some other boxes to do that... :-/

It has to be taken apart to replaces a disk :-(

This is another copy :-)

This is part of a series om making a DIY DAS,,, to put in my Tiny Datacenter Bunker,, it is not much of an issue to let a way more powerful PC control it.

@@MyPlayHouse Thank you. I had thought that the tiny Lenovo PC was the config that you planned to be located in the bunker-datacenter. Now I understand that it is just a test-config; that makes sense.

Not as I see it,, there are cables and a fan that makes that hard.

@@MyPlayHouse the 1 thing that is Wandering me is, the glasspanel in Front. That wont Block the airflow ?

This is copy No. 3 and 4 chances of ever needing them is slim.

If you use Tc it creates Checksums as it reads and writes then verifies after write that it hasn't changed You can also use tc to create the md5 sum files as well (so if you have static folders you can create hash file for the whole folder).

It won't let me post the name of the program tc keeps automod deleting my post

@@leexgx yes RU-vid deletes posts with links. Best just fully naming the program

@@Arachnoid_of_the_underverse it won't let me post the word te ra copy (it's not deleted this one as I can still edit it, i spaced out the name)

Servers are really meant to be in a server room,, not on the table in the living room.

They does not easily go in to a PC.

or OpenMediaVault

No I have not,, but I hear that it is not a subscription,, and I do not like that.