Hi, If you go with RAID6 setup on your RAID I think you will not need spare so much, as you will actually have data redundancy distributed over 2 disks. I think you can use 2 or 3 LUNS, just to have more flexibility in the solution, but it is not a must :)
For the usage of two copies on pool named "mypool" issue: zfs set copies=2 mypool Best regards, Ivailo Tanusheff -----Original Message----- From: b...@todoo.biz [mailto:b...@todoo.biz] Sent: Saturday, May 18, 2013 10:46 AM To: Ivailo Tanusheff Subject: Re: ZFS install on a partition Le 18 mai 2013 à 09:21, Ivailo Tanusheff <ivailo.tanush...@skrill.com> a écrit : > Hi, > > If you use HBA/JBOD then you will rely on the software RAID of the ZFS system. This is the config of my backup system - not the one I am planning to update. > Yes, this RAID is good, but unless you use SSD disks to boost performance and > a lot of RAM the hardware raid should be more reliable and mush faster. Ok > I didn't get if you want to use the system to dual boot Linux/FreeBSD or just > to share FreeBSD space with linux. Neither one ! I want to setup a full FreeBSD only system. Will be used to deploy jails. > But I would advise you to go with option 1 - you will get most of the system > and obviously you don't need zpool with raid, as your LSI controller will do > all the redundancy for you. Making software RAID over the hardware one will > only decrease performance and will NOT increase the reliability, as you will > not be sure which information is stored on which physical disk. Ok > > If stability is a MUST, then I will also advise you to go with bunch of pools > and a disk designated as hot spare - in case some disk dies you will rely on > the automation recovery. Also you should run monitoring tool on your raid > controller. I can't do that because of the design of the machine I will use. I only have LUN's available configured as volume on top of a RAID 6 pool of disks. This is presented as a block device to the system. > You can also set copies=2/3 just in case some errors occur, so ZFS can > auto0repair the data. if you run ZFS over several LUNs this will make even > more sense. Ok I'll try to figure out how to do that during install in order to have that as soon as possible during the system install. Thx. > > Best regards, > Ivailo Tanusheff > > -----Original Message----- > From: owner-freebsd-questi...@freebsd.org > [mailto:owner-freebsd-questi...@freebsd.org] On Behalf Of > b...@todoo.biz > Sent: Saturday, May 18, 2013 1:24 AM > To: Liste FreeBSD > Subject: ZFS install on a partition > > Hi, > > I have a question regarding ZFS install on a system setup using an Intel > Modular. > > This system runs various flavor of FreeBSD and Linux using a shared pool > (LUNs). > These LUNs have been configured in RAID 6 using the internal controller (LSI > logic). > > So from the OS point of view there is just a volume available. > > > I know I should install a system using HBA and JBOD configuration - but > unfortunately this is not an option for this server. > > What would you advise ? > > 1. Can I use an existing partition and setup ZFS on this partition using a > standard Zpool (no RAID). > > 2. Should I use any other solution in order to setup this (like full ZFS > install on disk using the entire pool with ZFS). > > 3. Should I avoid using ZFS since my system is not well tuned and It would be > asking for trouble to use ZFS in these conditions. > > > P.S. Stability is a must for this system - so I won't die if you answer "3" > and tell me to keep on using UFS. > > > Thanks. > > ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ BSD - BSD - BSD - BSD - BSD - BSD - BSD - BSD - ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ PGP ID --> 0x1BA3C2FD _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
