Category: OpenZFS
Anything related to OpenZFS
FreeBSD’s UEFI boot loader now supports ZFS pools
As of r294999 it’s possible to boot FreeBSD/amd64 stable/10 from ZFS pools on systems running UEFI firmware. Up until now I have booted my UEFI ZFS laptop using the older boot1.efi boot loader with /boot located on a UFS partition. Earlier today I updated my EFI System Partition (ESP), put /boot back where it belongs, […]
Read More → FreeBSD’s UEFI boot loader now supports ZFS poolsDell PowerEdge R320, JBOD, mfi(4), and gpart(8)
One of the old webservers at work, a Dell PowerEdge R200, crashed a couple of weeks ago. I suspect the six year old motherboard finally gave up.
Read More → Dell PowerEdge R320, JBOD, mfi(4), and gpart(8)An exercise on ZFS clones
This is an exercise I made, just to remind myself of how snapshots and clones work in ZFS. Also, how to properly get rid of them when you’re short of diskspace, or the dataset listing is too long, etc. First, we have the shell script that demonstrates the rise and fall of the initial dataset, […]
Read More → An exercise on ZFS clonesUnofficial errata: FreeBSD Mastery: ZFS
I bought the ebook edition of FreeBSD Mastery: ZFS this June. While the authors’ intentions are good, the 2015-05-21 edition has some errors and mistakes. The table below is nothing more than an unofficial errata of said book. Beware, what you find below might be due to my lack of understanding FreeBSD, ZFS, or the […]
Read More → Unofficial errata: FreeBSD Mastery: ZFSCloning a ZFS dataset using only zfs snapshot, zfs send, and zfs receive
Creating new BE’s using snapshots and clones can get messy with dependencies all over the place. I had an epiphany the other day, why not create a snapshot on the current dataset, send that snapshot to a new dataset within the same zpool (or elsewhere), and subsequently destroy the (two!) snapshots? Instant transfer of data, […]
Read More → Cloning a ZFS dataset using onlyzfs snapshot, zfs send, and zfs receive
/dev/ada1 failing
smartd sent me not one, but two emails today, regarding /dev/ada1.
Read More → /dev/ada1 failingReplicating an entire FreeBSD system using ZFS
I had a FreeBSD setup I wanted to replicate to another, identical computer. The source system runs ZFS and so should the receiving system. A recursive snapshot in combination with the zfs send and zfs receive commands proved most fruitful.
Read More → Replicating an entire FreeBSD system using ZFSForcing ZFS to choose 4K disk blocks aka ashift=12
A recent post to the Illumos ZFS list suggested using: to force ZFS to choose 4K disk blocks when creating zpools.
Read More → Forcing ZFS to choose 4K disk blocks aka ashift=12Uncorrectable parity/CRC error on Seagate ST500DM002-1BD142 KC45
A harddrive as identified below, reported uncorrectable parity/CRC error on two separate occasions this month.
Read More → Uncorrectable parity/CRC error on Seagate ST500DM002-1BD142 KC45ZFS vs Btrfs
I came across this post comparing ZFS to Btrfs. The post is undated and that makes it a bit hard to verify the claims against Btrfs. Although I’m partial towards ZFS, I hope Btrfs catches up. Meanwhile, maybe I should check out Btrfs for myself. Update 2013-12-05: Someone named “sasfater” wrote me an email today […]
Read More → ZFS vs Btrfs