Setting up new pool

[scorpoin]

Greetings,

I have dell 720R server with Raid5 configured 70Tb space. Now I wouldike to create a pool for my new installation as I select hdd data storage layout it shows me warning message data will be loss inmy strip available and there is no redundancy, I already configure Raid5 on my server . Please suggest since 70Tb is combination of hdds using raid5.

 

[winnielinnie]

I have dell 720R server with Raid5 configured 70Tb space.

I already configure Raid5 on my server

Please suggest since 70Tb is combination of hdds using raid5.

This is antithetical to ZFS and TrueNAS.

It is with ZFS itself that you configure redundancy, in the form of vdevs (which comprise a pool.)

• mirror vdev
• RAIDZ1 vdev
• RAIDZ2 vdev
• RAIDZ3 vdev

 

[Samuel Tai]

Are you using the Dell RAID controller? This isn't recommended for ZFS.

What's all the noise about HBA's, and why can't I use a RAID controller?

This is relevant to FreeNAS and TrueNAS CORE. Some parts of it might also be relevant to Scale, but I don't really know how reliable the Linux drivers are. 1) An HBA is a Host Bus Adapter. This is a controller that allows SAS and SATA devices to be attached to, and communicate directly with...

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[scorpoin]

I did some research so I came up to destroyed my raid config and set HBA mode and installed fresh TrueNAS .

Now my question is does RaidZ equal to Raid5 ? I can only see Raidz , Raidz2 and Raidz3 option only.

Regards

 

[Samuel Tai]

Now my question is does RaidZ equal to Raid5 ? I can only see Raidz , Raidz2 and Raidz3 option only.

More or less, but RAIDZ* isn't exactly like RAID5, as ZFS allows for variable parity block sizes, unlike RAID5's fixed parity block sizes. The different RAIDZ levels denote how many parity copies are retained over your pool.

Nowadays, RAIDZ1 (which more or less maps to RAID5) isn't recommended anymore, as loss of a single drive means you have NO redundancy during the resilver. RAIDZ2 is better, as you can still lose a drive during the resilver and still have a working pool.

Some differences between RAIDZ and mirrors, and why we use mirrors for block storage

ZFS is a complicated, powerful system. Unfortunately, it isn't actually magic, and there's a lot of opportunity for disappointment if you don't understand what's going on. RAIDZ (including Z2, Z3) is good for storing large sequential files. ZFS will allocate long, contiguous stretches of disk...

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[sretalla]

destroyed my raid config and set HBA mode and installed fresh TrueNAS .

Not enough...

What's all the noise about HBA's, and why can't I use a RAID controller?

This is relevant to FreeNAS and TrueNAS CORE. Some parts of it might also be relevant to Scale, but I don't really know how reliable the Linux drivers are. 1) An HBA is a Host Bus Adapter. This is a controller that allows SAS and SATA devices to be attached to, and communicate directly with...

www.truenas.com

If there's an IT mode firmware for your card, maybe you can use it, otherwise, replacement card is required if you care about the data.

 

[scorpoin]

my raid card is P840 which one should I buy then?

 

[sretalla]

Hello, can someone please help with sas card advice ? lsi 2008 vs 9300

Hello. I'm new to these forums, but not new to Truenas. Been using for years, since it was Freenas. I'm upgrading a server I have running sas, lsi cards. I have a 2008 lsi hba controller, 8i. I have questions, was hoping to get advice. I am confused trying to buy upgrade sas controller, I...

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