Following on from my previous post regarding AFP and iSCSI benchmarks i’ve decided (after many requests) to post a few raw benchmarks of the system gathered by bonnie++, the environment is as follows:
CPU: Athlon 64 3700+ RAM: 2gb DDR400 Controllers: 2x SATA-II and 1x SATA-I Hard Drives: 7x Samsung 2tb Spinpoint F3 5600 RPM OS: NexentaStor 3 ZFS Config: Standard raidz1 with dedup=off and compression=off
So I gathered a few results… after some annoying results I found a bottleneck in my system on 1 of the drives that seemed to bring the benchmark result down greatly, however once this was worked out I acheived the following: Continue reading →
Many people already know that the Samsung green drives have a bug in the firmware that may cause data loss, Samsung have created a patch that you need to create a bootable floppy disk along and drag in their file, if like me you don’t have a floppy disk drive & don’t want to mess around with USB booting and creation of a drive or just cannot boot from USB then you’ll need another solution, i’ve put together a quick bootable CDROM ISO that contains freedos and the patch, simply boot and type F4EG and hit enter, the patch will automatically detect your drives and update them. I hope this helps people out as it did me. As quoted from the original site:
“If identify commmand is issued from host during NCQ write command in the condition of PC ,
write condition is unstable. So It can make the loss of written data.” (Model : F4EG HD204UI, HD204UI/Z4, HD204UI/UZ4, HD155UI, HD155UI/Z4, HD155UI/UZ4)
Well, i’ve used FreeNAS for around 2 years+ now, and all has been good, however, in that time demand for large quantities of storage has now been joined by demand for high speed storage; Once I had replaced all of my drives with 2tb 7200rpm drives I realised that FreeNAS wasn’t giving me the performance on each drive that i’d like.
Welcome NexentaStor… a storage appliance natively supporting ZFS as its based on OpenSolaris! NexentaStor offers many of the same features of FreeNAS, however at a greater level of performance. This comes at a cost though, the free Community edition is limited to a some what large 18tb, whereas the paid version will cost you.
Also NexentaStor is a pure storage appliance, although it supports CIFS/iSCSI/NFS and the likes, it does not have all the bells and whistles of FreeNAS… but for me, there is no use having all these features if I can’t have the speed.
I’m installing NexentaStor now as we speak, after which I’ll be posting a review / tutorial on NexentaStor after i’ve got it up and running and configured to my liking I hope you enjoy it!
Hi everyone! I keep getting lots of emails from people asking where they can buy xyz to complete the tutorials and try out some of the things listed on CaptainGeek, well after I kept emailing people the same links i had a thought, why not setup an amazon affiliate store. Basically, i’ve setup a small amazon site with a small selection of products (only those used for the tutorials on this site + related ones), purchases and payments are handled by amazon, however a small percentage of the sale goes to helping fund the server this website is hosted on AT NO EXTRA COST TO YOU so its a win win situation, please use the links whenever you can.
Have you seen the Drobo box? it’s a SAN that allows you to create giant volumes and hot swap out hard drives at will with failure tolerance… bad news, is that it costs close to £1000 even without the drives, i’ll explain how to make a better one… for free! =).
ZFS (Zettabyte Filing System) is Sun’s newest file-system offering, its supported on FreeBSD / Solaris natively and Mac OS X / Linux / Windows via third-party utilities. I’m gonna keep this guide, simple, short and sweet, so i’ll bullet list the main features that wow people about ZFS =)
It can store up to 340 quadrillion zettabytes of data (no other production filing system can do this)
It checksum’s your data on the fly so you can check for integrity by “scrubbing” it (identifying broken drives before they completely die)
It supports every raid configuration you can think of natively and doesn’t suffer from the raid5 data-hole.
You can create snapshots of your data that do not waste hdd capacity.
Volumes or “Pools” can be expanded at any time, so you can start with a 2tb raid, and increase it to a 10tb raid with no data loss.
You can mix/match capacities, brands, rpm’s of drives.
Its reliable* (on officially supported incarnations anyway)
Its a memory whore (don’t try it unless you have 2gb ram on your system)
Its supported in the latest version of FreeNAS (0.7)
Allows hotplugging of drives when one fails (so you don’t lose data/time)
Hotspares are supported
Can be easily transferred / transported to any other ZFS supported system without extensive configuration or any data loss.
Its free free free free (under CDDL).
Think of a hardware raid5 or a geom_concat/raid and then think about those again, but without any of the issues / flaws they have… thats what ZFS is! =)
So lets get started, I’ll run through creating and bringing a ZFS raid online first, and then some maintenance commands afterwards. I suggest trying this on a Continue reading →