Admin sys

RAID1 array enlarging

Here’s a quick  recipe to easily enlarge a RAID1 array with the least possible downtime, using linux 2.6 and mdadm. We’ll start with a two-disk setup, /dev/sda and /dev/sdb, containing two arrays, /dev/md0 and /dev/md1. /dev/md0 is mounted on / and /dev/md1 is mounted on /backup. We want to...

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Registar switch

Back in may 2001, I grabbed my first domain name, colino.net. I wanted to stop switching URL each time I switched the hosting. At the time I had no debit card, and I chose the first registrar I found which accepted payment by cheque, amen.fr. Since then, I grumbled...

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Lazily testing memory

I had, until recently, a problem when it came to test memory on the nodes in my lab. Until now, I was able to PXE boot memtest+, but had to go down to the lab and plug a screen to check the output. Multiple annoyances: first I had to...

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