Category: storage / NAS / QNAP

what use is it if one disk fails… and half of the swap area goes lost and you can not resync the disks because some system-processes are failing…. # switch off swap space swapoff -a # check out what software […]

watch in HD 🙂 DO NOT CREATE SWAP AS RAID0! (you gonna want more stability and less performance: how to change swap from raid0 to raid1) follow this guide to get full blown Debian on your kirkwood QNAP NAS: http://www.cyrius.com/debian/kirkwood/qnap/ts-219/install/ 1. […]

update: safety first! when it comes to important files: safety comes first while xfs is surely doing a great and fast job, test if undelete utilities work now for ext4, if yes, go for ext4 (having experienced some problems with […]

  screenshot of the web gui, with all the arty farty fancy stuff: … http://www.cyrius.com/debian/kirkwood/qnap/ QNAP TS-219P and TS-219P+ Component Comment CPU Marvell Kirkwood 88F6281 A0, 1.2 GHz (TS-219P) or 88F6282 1.6 GHz (TS-219P+) RAM 512 MB DDR II Flash […]

examples: non-destructive badblocks -nvs /dev/xxx This would check the drive “sdb” in non-destructive read-write mode and display progress by writing out the block numbers as they are checked. WARNING! DATA LOSS! destructive (-w = write test) update: 2024: want to […]

when a harddisk goes bad, i thought that the filesystem is marking the bad blocks as “bad” and using other blocks. never the lass i had the case where one samsung disk started having 2 bad blocks going undetected. now […]

update: WHILE STILL POWERED ON IMMEDIATELY backup the ext4 journal to file on usb stick: debugfs -R “dump <8> /mount/usb-stick/sda.journal” /dev/sda (assuming sda is the drive where the deletion happened) then “hard reset” unplug the system. then checkout this guide […]

update: You can actually configure htop (F10) to show disk usage. the name is iotop – like htop shows you the usage of your cpu and RAM – iotop shows you the usage of input/output devices 🙂 so you can […]

those two disks should become one md0 RAID1 mirroring array… the hardware: what drives to use? this was NEVER a problem in the past… so things become increasingly complicated as vendors try to push the limits of the technology, in […]

would go for ext4 the next time if the user already has OS installed, the user probably wants to add RAID1 to existing system look here the user has a ASRock E350M1 with sda beeing 320GB and sdb beeing 3TB, […]

WARNING: use at own risk! use a dedicated computer for shredding harddisk, that has no valuable data stored or attached (in case the operator enters the wrong drive letter = all data gone) have been warned! WARNING! this method might […]