June 17, 20242 yr Hey, i just installed unraid, made an array consisting of an 2x12TB array (parity & disk1) and two chache disks consisting of an nvme and an ssd. The ssd was in use before, it contains the uefi, boot and data section of a previous installment of Ubuntu. I went through the process of building up the array (24h) and clicked FORMAT for the ssd, which was labeled 'unmountable'. So far, so good. But for whatever reason, unraid decided just to take the 2GB boot section of that drive to format, not the whole disk. I don't see any way to change that in the backend...is this a bug or a feature i'm too petted to have dealt with for my entire life? I never used an option or a command named 'FORMAT' which just leaves a filesystem without formatting. This is not a useful label on that button. So, i don't want to destroy anything or want to endanger the consistency of the array, so i kindly ask, what exact steps have to be done (using command line? parted?) to get the full capacity of the disk and get it preperated for the filesystem deployment, when pressing FORMAT. I'm not very experienced in using Linux, i probably need a beginner's description. Please don't get me wrong: i surely can google 'parted' myself, but i really want to know the exact parameters that should be used in the situation of adding an ssd as a cache into a flawlessly working unraid array. Thanks in advance!
June 17, 20242 yr Community Expert Please post the output of: ls -l /dev/mapper , fdisk -l /dev/sdd and blkid /dev/sdd
June 17, 20242 yr Author ls -l /dev/mapper total 0 crw------- 1 root root 10, 236 Jun 15 20:08 control lrwxrwxrwx 1 root root 7 Jun 15 20:08 ubuntu--vg-ubuntu--lv -> ../dm-0 fdisk -l /dev/sdd Disk /dev/sdd: 238.47 GiB, 256060514304 bytes, 500118192 sectors Disk model: SanDisk SD7TB6S2 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x00000000 Device Boot Start End Sectors Size Id Type /dev/sdd1 2048 500118191 500116144 238.5G 83 Linux blkid /dev/sdd /dev/sdd: PTTYPE="dos" Edited June 17, 20242 yr by Gekko
June 17, 20242 yr Community Expert Solution 19 minutes ago, Gekko said: ubuntu--vg-ubuntu--lv -> ../dm-0 This is likely the problem, do you remember where/how that device was formatted before? As for the current issue, reboot, before array start wipe the SSD with blkdiscard -f /dev/sdX start the array, and it should now format correctly.
June 17, 20242 yr Author Thank you, blkdiscard -f /dev/sdX blkdiscard -f /dev/sdb did the job, formatted the unmonted drive again and the full capacity is available now! Thank you so much!
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