One of my clients has a NAS device. Last week they tried to do what should have been a routine RAID operation, they added a new larger disk as a hot-spare and told the RAID array to replace one of the active disks with the hot-spare. The aim was to replace the disks one at […]
The version of btrfs-tools in Debian/Jessie is incapable of creating a filesystem that can be mounted by the kernel in Debian/Wheezy. If you want to use a BTRFS filesystem on Jessie and Wheezy (which isn’t uncommon with removable devices) the only options are to use the Wheezy version of mkfs.btrfs or to use a Jessie […]
My last problem with BTRFS was in August . BTRFS has been running mostly uneventfully for me for the last 4 months, that’s a good improvement but the fact that 4 months of no problems is noteworthy for something as important as a filesystem is a cause for ongoing concern.
A RAID-1 Array
A week […]
In a comment on my post about Taxing Inferior Products  Ben pointed out that most crashes are due to software bugs. Both Ben and I work on the Debian project and have had significant experience of software causing system crashes for Debian users.
But I still think that the widespread adoption of ECC RAM […]
I’ve just installed BTRFS on some systems that matter to me. It is still regarded as experimental but Oracle supports it with their kernel so it can’t be too bad – and it’s almost guaranteed that anything other than BTRFS or ZFS will lose data if you run as many systems as I do. Also […]
The general trend seems to be that cheap hard drives are increasing in capacity faster than much of the data that is commonly stored. Back in 1998 I had a 3G disk in my laptop and about 800M was used for my home directory. Now I have 6.2G used for my home directory (and another […]
As storage capacities increase the probability of data corruption increases as does the amount of time required for a fsck on a traditional filesystem. Also the capacity of disks is increasing a lot faster than the contiguous IO speed which means that the RAID rebuild time is increasing, for example my first hard disk was […]
LWN has an interesting article comparing recent developments in the Linux world to the “Unix Wars” that essentially killed every proprietary Unix system . The article is really interesting and I recommend reading it, it’s probably only available to subscribers at the moment but should be generally available in a week or so (I used […]
One of my clients is currently investigating new hosting arrangements. It’s a bit of a complex process because there are lots of architectural issues relating to things such as the storage and backup of some terabytes of data and some serious computation on the data. Among other options we are considering cheap servers in the […]
I previously wrote about my first experiences with BTRFS . Since then I’ve been using BTRFS on more systems and have had good results. The main problem I want to address is with the reliability of RAID .
Requirements for a File Server
Now one of my clients has a need for a new fileserver. […]