Mdadm has one nice feature which enables us to replace drives with larger capacity ones. We can replace 500GB drives with 2TB drives with no downtime, it only takes time. At the start we have following setup: We proceed and replace one drive with a larger one. New empty drive …
There are 2 disks containing / and SWAP partition. # lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 136.8G 0 disk ├─sda1 8:1 0 130.4G 0 part │ └─md0 9:0 0 130.3G 0 raid1 / └─sda2 8:2 0 6.4G 0 part └─md1 9:1 0 6.4G 0 raid1 [SWAP] …
Depending on an use case sometimes you have to change hotspare disk behavior. In this case smartctl was monitoring all the disks behind hardware RAID, and one disk failed to read SMART Attribute Data. # megaclisas-status– Controller information — — ID | H/W Model | RAM | Temp | BBU …
Have additional ~130GB for upload, but not enough space on the “/osm” volume, as can be seen with pydf command. # pydfFilesystem Size Used Avail Use% Mounted on /dev/osmhr/root 49G 6300M 41G 12.5 [####…………………………] / /dev/md0 921M 155M 703M 16.8 [######………………………] /boot /dev/osmhr/osm 837G 730G 106G 87.3 [##############################…] /osm Let’s …