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Obsolete Releases => SME Server 7.x => Topic started by: Smeily on November 16, 2006, 07:06:35 PM
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Hi,
In sme6 you could choose install one disk, but in sme7 you don't have that option. If I have successfully established a hwraid1 I should be able to unplug one of the disks insert and unplug the other insert again. I can't.
I can setup hwraid1 on the scsi-controller, but sme can see to drives and install swraid1. Have tried to install one disk and make mirror in scsi-controller-setup but didn't work either.
Any suggestions?
SMEily :)
IBM e-server with 2 hotswopdisks 320 widescsi-controller.
All hardware supported.
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Hi,
In sme6 you could choose install one disk, but in sme7 you don't have that option. If I have successfully established a hwraid1 I should be able to unplug one of the disks insert and unplug the other insert again. I can't.
I can setup hwraid1 on the scsi-controller, but sme can see to drives and install swraid1. Have tried to install one disk and make mirror in scsi-controller-setup but didn't work either.
Any suggestions?
SMEily :)
Are you sure your SCSI controller is a RAID controller?
It really sounds to me like it either isn't a RAID controller or is not set up correct as RAID.
SME should see your drives as one on a hardware RAID1 but it still installs as if it was RAID1 with just one disk enabled.
What is your controller brand and type?`
Per
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Here is som information:
Master scsi controller AIC-7902
Adaptec HostRAID bios v4.30.9
Personalities : [raid1]
md1 : active raid1 sda1[0] sdb1[1]
104320 blocks [2/2] [UU]
md2 : active raid1 sda2[0]
71577536 blocks [2/1] [U_]
unused devices: <none>
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/main-root
66G 1.3G 61G 3% /
/dev/md1 99M 19M 75M 21% /boot
none 505M 0 505M 0% /dev/shm
fstab:
/dev/main/root / ext3 usrquota,grpquota 1 1
/dev/md1 /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults 0 0
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
/dev/main/swap swap swap defaults 0 0
/dev/hda /media/cdrom auto pamconsole,exec,noauto,managed 0 0
/dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0
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"SME should see your drives as one on a hardware RAID1 but it still installs as if it was RAID1 with just one disk enabled".
That is exactly what I want to awoid sw-raid on hw-raid!
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Smeily
We have hardware raid setup here at work ... Raid 5 using 3 Scsi hot swap HDD's.
if I run
cat /proc/mdstat
our shows
[root@server1 ~]# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 ida/c0d0p1[0]
101888 blocks [2/1] [U_]
md2 : active raid1 ida/c0d0p2[0]
70991936 blocks [2/1] [U_]
This is normal as I read.
This is the readout of out test server with a software raid 5 setup
[root@server5 ~]# cat /proc/mdstat
Personalities : [raid1] [raid5]
md1 : active raid1 sda1[0] sde1[4] sdd1[3] sdc1[2] sdb1[1]
104320 blocks [5/5] [UUUUU]
md2 : active raid5 sda2[0] sde2[4] sdd2[3] sdc2[2] sdb2[1]
35117056 blocks level 5, 256k chunk, algorithm 2 [5/5] [UUUUU]
Regards,
Tib
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Smeily
We have hardware raid setup here at work ... Raid 5 using 3 Scsi hot swap HDD's.
if I run
cat /proc/mdstat
our shows
[root@server1 ~]# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 ida/c0d0p1[0]
101888 blocks [2/1] [U_]
md2 : active raid1 ida/c0d0p2[0]
70991936 blocks [2/1] [U_]
This is normal as I read.
I think you may of missed the OP's point.
They do not want their hardware raid array being used as a single drive in a degraded software raid array.
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Adaptec "host-raid" is a SOFTWARE raid adapter.
I had set my ibm e-server's host-raid too and sme saw 2 separate drives which were set up as a software raid.
All is working fine inspite of the FAKE raid :D
b.t.w there are linux drivers around for the hostraid.
Wouldn't recommend it cause its softraid either way.
Do you have the ibm e-server x-series 206?
Dirk
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It is an IBM e-server x226 and here is the description of the RAID features:
Providing outstanding performance and flexibility for servers and high-end work-stations, the dual-channel AIC-7902 delivers Ultra320 SCSI data rates up to 320 MBytes/sec to address emerging band-width-hungry applications, such as real-time video, data mining, Internet/Intranet, and scientific modeling and simulation. The chip features a 66 MHz, 64-bit PCI interface and a 133 MHz, 64-bit PCI-X interface. 320 MByte/sec SCSI data transfer rates. 133 MHz, 64 bit, PCI-X interface that provides 1066 MByte/sec bandwidth. Signal compatible with AIC-7892x Ultra160 SCSI ASIC. Supports HostRAID™ hardware mirroring!!!. PCI 2.3 and PCI-X 1.0A compliant.
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"SME should see your drives as one on a hardware RAID1 but it still installs as if it was RAID1 with just one disk enabled".
That is exactly what I want to awoid sw-raid on hw-raid!
Why do you want to avoid it? It isn't doing any harm.
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It's not the harm but the benefit of having hotswap funtionality.
I have now tried to disable the hwraid and stay with the swraid the SME-server use. Fast but no hotswap. Trying to hotswap makes that drive unusable even after a reconfigure and reboot. When I then try to pull out the second drive the party end (after the first drive is back in of course). There seems to be a master-slave relationship between the two drives?
:? not so Smeily.
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It's not the harm but the benefit of having hotswap funtionality.
I'm sure that linux software raid is not interfering with hotswap capability. If you have a hardware raid controller having hotswap capability, then that should work without linux software raid having any visibility of it.
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Smeily,
SME 7.0 is setup to install ANY combination of disks as a raid array. If there is a single disk it will be installed as a degraded raid array. I have a single disk server and it is installed as a degraded raid array. Wouldn't your hardware raid be recognized as a singe disk and installed the same way?
I should be able to unplug one of the disks insert and unplug the other insert again. I can't.
I would think the following is correct:
If you have a hardware raid controller having hotswap capability, then that should work without linux software raid having any visibility of it.