debian on a raid5 (4TB) issues
in [Debian]
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From: Israel Garcia on 16 Apr 2010 12:20 Hi, maybe OT but, I\m trying to install debian lenny on a raid5 with 4TB. OS sees one big sda with 4TB, I can particion /boot, / and swap but it only recognize 78GB instead the 4TB available. Is this because the partition in booteable? Can I install debian OS on this hdd with these 3 partitions and use the rest for LVM? Thanks in advance, -- Regards; Israel Garcia -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/j2q194a2c241004160911nb2b1ad62xf899de7a0987f43c(a)mail.gmail.com
From: Tim Clewlow on 16 Apr 2010 13:50 > Hi, maybe OT but, I\m trying to install debian lenny on a raid5 with > 4TB. OS sees one big sda with 4TB, I can particion /boot, / and swap > but it only recognize 78GB instead the 4TB available. Is this > because > the partition in booteable? Can I install debian OS on this hdd > with > these 3 partitions and use the rest for LVM? Thanks in advance, > .. Seriously consider using Raid 6. If you use Raid 5 then the probability of an unrecoverable read error (URE) occurring while rebuilding the 4TB of data is IMO a little too high. With Raid 6 it would require 2 URE's that happen to be located in the same raid segment on both disks - the odds of that are extremely low. my 2c,- tim -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/b15e5b53f92a5f588f473e131f0b6409.squirrel(a)192.168.1.100
From: Camaleón on 16 Apr 2010 14:00 On Sat, 17 Apr 2010 03:34:36 +1000, Tim Clewlow wrote: >> Hi, maybe OT but, I\m trying to install debian lenny on a raid5 with >> 4TB. OS sees one big sda with 4TB, I can particion /boot, / and swap >> but it only recognize 78GB instead the 4TB available. Is this because >> the partition in booteable? Can I install debian OS on this hdd with >> these 3 partitions and use the rest for LVM? Thanks in advance, >> > . > > Seriously consider using Raid 6. If you use Raid 5 then the probability > of an unrecoverable read error (URE) occurring while rebuilding the 4TB > of data is IMO a little too high. With Raid 6 it would require 2 URE's > that happen to be located in the same raid segment on both disks - the > odds of that are extremely low. > > my 2c,- tim +1 Rebuilding time in a 4-TB RAID5 volume will take more than 8 hours (in best-case scenario), time enough for another disk gets dropped from the array and so loosing data :-/ Greetings, -- Camaleón -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/pan.2010.04.16.17.54.38(a)gmail.com
From: Stan Hoeppner on 16 Apr 2010 20:20 Israel Garcia put forth on 4/16/2010 11:11 AM: > Hi, maybe OT but, I\m trying to install debian lenny on a raid5 with > 4TB. OS sees one big sda with 4TB, I can particion /boot, / and swap > but it only recognize 78GB instead the 4TB available. Is this because > the partition in booteable? Can I install debian OS on this hdd with > these 3 partitions and use the rest for LVM? Thanks in advance, What PCIe RAID card are you using? -- Stan -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BC8FCDC.2060007(a)hardwarefreak.com
From: Israel Garcia on 17 Apr 2010 01:30
On Sat, Apr 17, 2010 at 2:12 AM, Stan Hoeppner <stan(a)hardwarefreak.com> wrote: > Israel Garcia put forth on 4/16/2010 11:11 AM: >> Hi, maybe OT but, I\m trying to install debian lenny on a raid5 with >> 4TB. OS sees one big sda with 4TB, I can particion /boot, / and swap >> but it only recognize 78GB instead the 4TB available. Is this because >> the partition in booteable? Can I install debian OS Â on this hdd with >> these 3 partitions and use the rest for LVM? Thanks in advance, > > What PCIe RAID card are you using? Adaptec AAC-RAID card inside a supermicro server. > > -- > Stan > > > > -- > To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian..org > Archive: http://lists.debian.org/4BC8FCDC.2060007(a)hardwarefreak.com > > -- Regards; Israel Garcia -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/p2j194a2c241004162224k8b026c99ia2205e704cc8eed4(a)mail.gmail.com |