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SnapRAID (HOW-TO)
Has anyone fiddled with SnapRAID?
a quote from the SnapRAID site:
SnapRAID is a backup program for disk arrays. It stores parity information of your data and it recovers from up to six disk failures.
SnapRAID is mainly targeted for a home media center, with a lot of big files that rarely change.
Beside the ability to recover from disk failures, other features of SnapRAID are:
All your data is hashed to ensure data integrity and to avoid silent corruption.
If the failed disks are too many to allow a recovery, you lose the data only on the failed disks. All the data in the other disks is safe.
If you accidentally delete some files in a disk, you can recover them.
You can start with already filled disks.
The disks can have different sizes.
You can add disks at any time.
It doesn't lock-in your data. You can stop using SnapRAID at any time without the need to reformat or move data.
To access a file, a single disk needs to spin, saving power and producing less noise.
Link to the SnapRAID site
HOW-TO install SnapRAID 11.0 on ClearOS 7.x
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Responses (10)
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Accepted Answer
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Accepted Answer
***Important please first try this in a virtual machine***
Okay. let's install SnapRAID 11.0 on ClearOS Community 7.x.
Update your system
yum update
Install gcc
yum --enablerepo=* install gcc
Make directory
mkdir /var/lib/snapraid
Change permissions
chmod 755 /var/lib/snapraid
Change directory
cd /var/lib/snapraid
Download SnapRAID.
wget https://github.com/amadvance/snapraid/releases/download/v11.0/snapraid-11.0.tar.gz
Unpack SnapRAID:
cd tmp
tar xvzf snapraid-11.0.tar.gz
Change directory:
cd snapraid-11.0
configure / make / make check / make install SnapRAID:
./configure
make
make check
make install
Check if SnapRAID is installed:
snapraid status
Output:
[root@localhost snapraid]# snapraid status
Self test...
No configuration file found at '/etc/snapraid.conf'
Remove download package
rm /var/lib/snapraid/snapraid-11.0.tar.gz
So here you go. SnapRaid is installed!
You can find the manual by typing:
man snapraid
03/25/2016 v0.1
03/26/2016 v0.2
01/02/2017 v0.3
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Accepted Answer
Morning guys,
I have tried to install SnapRAID 11.0 in a virtual machine and it installed successfully. I'm not sure what went wrong last week when trying to compile SnapRAID... I have rewrite the install guide. Please if there are some errors in the install guide let me know then I will change it.
@Nick I will also check the repos and adjust the how-to that it also can be installed from the repos. -
Accepted Answer
It seems to work fine in my virtual machine. I've set-up a parity drive with 1 data disk. I've sync everything and "diskp" (parity drive) holds all parity data. This is really cool solution with cheap 8TB SMR drives from Seagate's.
snapraid sync
Self test...
Loading state from /var/snapraid/snapraid.content...
WARNING! Content file '/var/snapraid/snapraid.content' not found, trying with another copy...
Loading state from /var/flexshare/shares/disk01/snapraid.contet...
No content file found. Assuming empty.
Scanning disk d1...
Using 0 MiB of memory for the FileSystem.
Initializing...
Saving state to /var/snapraid/snapraid.content...
Saving state to /var/flexshare/shares/disk01/snapraid.contet...
Verifying /var/snapraid/snapraid.content...
Verifying /var/flexshare/shares/disk01/snapraid.contet...
Syncing...
Using 16 MiB of memory for 32 blocks of IO cache.
100% completed, 4699 MB processed:00 ETA
d1 3% | **
parity 89% | ******************************************************
raid 2% | *
hash 4% | **
sched 0% |
misc 0% |
|______________________________________________________________
wait time (total, less is better)
Everything OK
Saving state to /var/snapraid/snapraid.content...
Saving state to /var/flexshare/shares/disk01/snapraid.contet...
Verifying /var/snapraid/snapraid.content...
Verifying /var/flexshare/shares/disk01/snapraid.contet...
snapraid status
Self test...
Loading state from /var/snapraid/snapraid.content...
Using 0 MiB of memory for the FileSystem.
SnapRAID status report:
Files Fragmented Excess Wasted Used Free Use Name
Files Fragments GB GB GB
3 0 0 0.0 4 3 54% d1
--------------------------------------------------------------------------
3 0 0 0.0 4 3 54%
100%|o
|o
|o
|o
|o
|o
|o
50%|o
|o
|o
|o
|o
|o
|o
0%|o_____________________________________________________________________
0 days ago of the last scrub/sync 0
The oldest block was scrubbed 0 days ago, the median 0, the newest 0.
No sync is in progress.
The 100% of the array is not scrubbed.
You have 1 files with zero sub-second timestamp.
Run the 'touch' command to set it to a not zero value.
No rehash is in progress or needed.
No error detected.
The only thing how do we let this work with Flexshares? Mount every data disk to a flexshare? Not sure yet...
/dev/sdb --> var/flexshare/shares/disk01
/dev/sdc --> var/flexshare/shares/disk02
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Accepted Answer
I think I found a interesting option to solve the problem to expand directories over serval drives.
Mergerfs
mergerfs is a union filesystem geared towards simplifing storage and management of files across numerous commodity storage devices. It is similar to mhddfs, unionfs, and auks.
Features
Runs in userspace (FUSE)
Configurable behaviors
Support for extended attributes (xattrs)
Support for file attributes (chattr)
Runtime configurable (via xattrs)
Safe to run as root
Opportunistic credential caching
Works with heterogeneous filesystem types
Handling of writes to full drives
Handles pool of readonly and read/write drives
and it seems to work on ClearOS but to be certain I have to do some testing. -
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Accepted Answer
I was quite literally getting the things together I needed to build/upgrade a Community box to 7.x and decided to pop into the forums only to see this.
Is it safe to assume this applies to the latest 7.x iso? Also maybe I'm misunderstanding something here, but in the many years I've used SnapRAID I've never built it with automake installed. In fact I just built SnapRAID 11 on a 5.x box a week or so ago that didn't have automake installed.
Thanks for the insight.
Marcel van Leeuwen wrote:
This guide is not working at the moment cause SnapRAID needs version 1.14 of make and the repositories holds version
[root@enterprise snapraid-11.0]# rpm -qv automake
automake-1.13.4-3.el7.noarch
So you can not build SnapRAID. -
Accepted Answer
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Accepted Answer
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