Dell Poweredge SC1420 Raid 1 hard disk failure

Following a hard disk failure on our Dell Poweredge SC1420 server we replaced the disk with a new one, on start up the raid controller recognised the replacement disk and that the raid 1 configuration was broken but instead of offering a repair it advised degrading, which we accepted. We then viewed the configuration using administrator in the RSM application but could find no meens of repairing the raid...why? Print screen of RSM utility attached. With other raid adapters we have used the repair is automatic upon recognition that the drive had failed and been replaced?

Many thanks
RSM.doc
32655Asked:
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32655Author Commented:
Thanks Punky but we don't have this utility...we have something called RSM (Raid Storage Manager) as shown in the print screen...are you saying we should have/use it?

Many thanks
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PUNKYCommented:
You should use the Dell OpenManager CD that comes with Dell system or download from Dell support website and use it to rebuild raid. It should be installed in system at very first day, but ... anyway, get it and use it though.
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32655Author Commented:
Interesting...this server is nearly two years old and definitely DID NOT come with OpenManager installed or I'm pretty sure with the said CD...I know newer ones do. Anyway I have beifly looked into downloading it from Dell...It isn't one of the recommended downloads for a SC1420, the only utility they offer is the RSM one we have...so sorry to labour the point but are you sure using this utility is the way to go and we aren't going to end up with compatability issues?

Many thanks again
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32655Author Commented:
Oh yes I can find the utility and have already downloaded it BUT the compatability link with it doesn't include the SC1420:

http://support.dell.com/support/topics/global.aspx/support/downloads/en/compatibility?c=us&cs=555&l=en&releaseid=R171447&s=biz&~mode=popup

I may well give it a try anyway or call Dell, tomorrow as it's well past midnight here, many thanks I'll let you know how it turns out.
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sifueditionCommented:
I have checked both Dell's version of user guide and Adaptec's.  This is an Adaptec software that Dell provides as an alternative for some systems.  Neither mentions any option for "degrading" an array.  The only reference is to a degraded array, meaning an array with a drive offline.  I would look carefully at this array and see if this appears to be a single disk raid 0.  Maybe this was an option to break the mirror in which case, you no longer have redundancy.  I would suspect that you will have to recreate the array to restore this to a redundant state.  Also, this system lists the CERC 2s and the CERC 6 as the possible raid controllers.  Which are you using?
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32655Author Commented:
Thanks for your reply sifuedition, it definitely was Raid 1, in other words two disks mirroring each other...but when we removed the faulty disk and replaced it with a brand new whilst the raid recognised that one disk had failed and been replaced by a new healthy one it didn't either attempt to rebuild the raid or ask if we wanted to rebuild it. It simply halted with a message on screen saying words to the effect, if you continue raid will be degraded otherwise power off and check cables etc. We accepted the forner as the only way to power the server back up, hoping the RSM (Raid Storage Manager) would allow us to rebuild the array but it doesn't. So we tried deleting the logical drive so we could remake it and got the message in the attached print screen. I'm away from the Office for a few days and can only see what is happening remotely...currently we are running on the single disk and I can't tell you which raid controller we have until we reboot the machine next time I'm on site. Any further suggestions appreciated.
RSM2.doc
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sifueditionCommented:
So when you right click the replacement disk and the conditional menu comes up it SHOULD have rebuild as one of the options.  If not, let us know what options do show up.  Assuming it does show up, what happens when you attempt to choose rebuild?
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32655Author Commented:
Thanks for comming back, right click options as attached print screen
RSM3.doc
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sifueditionCommented:
Ok, thanks for that info.  That is a right click on the array.  What happens when you right click on the physical drive in the display just to the left of that?
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32655Author Commented:
Attached please find print screens for the right click of both physical drives, many thanks.
RSM4.doc
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sifueditionCommented:
Ok.  The drive on the left would appear to be the one you are booting from.  That is based on the fact that the drive on the right has the option to be assigned as a hotspare.  Since the drive on the right can be configured as a hotspare, that implies that it currently does not have any configurations.  I would check the properties of the drive on the left.  Make sure that the raid level still indicates a raid 1.  If that is not in the properties of the physical disk, I would check the properties of the logical drive (array).  When the degrade option was selected, it is possible that this was modified.  Assuming that this does still show that configuration to be a raid 1, I would set the physical disk on the right to be the hotspare and attempt to "trick" the system into starting a rebuild option that way.  I reread the logs here and do not see that we have tried that.  If the properties show that this is now a raid 0 or a volume, we may be back to the necessity to recreate the array.  Keep in mind the difference between a degraded mirror and a "broken" mirror.  If a drive is missing, the array is simply degraded.  If you chose to break the mirror in the software, you are changing the raid level of the array so that the disks are independant.  If I remember correctly with this controller, if you break a mirror, you will not have the option to reconfigure the array back to a redundant mirror.  Just let me know how that goes and we will see what we should do based on those results.
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32655Author Commented:
Many thanks for that sifuedition...the properties of the physical drive on the left do still show a raid 1 configuration, so as you suggested I set the physical disk on the right as a hotspare and immediately the raid started rebuilding itself. It looks like it will take a while to complete the rebuild, but at the moment it's looking good...I'll post again when it completes.
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32655Author Commented:
Yes we now have a fully rebuilt raid 1 configuration...your help is much appreciated sifuedition , many thanks again.
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32655Author Commented:
Your help was much appreciated, many thanks
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sifueditionCommented:
Glad I could help.
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32655Author Commented:
Further to this post which "sifuedition" helped us to resolve we now have another problem with this same Raid posted at:
http://www.experts-exchange.com/Storage/Storage_Technology/Q_23186010.html
Can "sifuedition" or anyone else help please, many thanks
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