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Full Discussion: Metastat shows state needs maintenance
Operating Systems Solaris Metastat shows state needs maintenance Post 303037807 by gull04 on Wednesday 14th of August 2019 02:57:32 AM
Old 08-14-2019
Hi prvnrk,

I'd suggest that your best approach here is to take a couple of steps back with this one if you can, where you have two options the way that I see this.

Option 1.

Regress the changes to the system and go with the original configuration, bring the system up and attempt to bring in the Nimble storage with your existing IBM storage still available and then use host mirroring to bring the Nimble disks into the mirror sets. This would prove that all is well with the system and allow you to prove that the Nimble storage is compatible with the installed system. Here you would create new meta devices and add them into the mirror set metainit d53 and metainit d54 once created you would then use metattach d5 d53 and metattach d5 d54 this would give you a fourway mirror. Once everything is mirrored up you can remove the original d51 and d52 devices and clear the storage from the OS.

Once you have the new mirrors silvered and working you can remove the old IBM disks from the mirrors, result is that the system has been migrated to the new storage and there is no outage to the application.

Option 2.

Remove the Nimble storage and bring the system up - obviously without the application being started, remediate any issues to give you a clean running server. Then following the standard process add the Nimble storage and configure the device tree and metadb with the new devices ( d5, d51 and d52 ), then you'll have to restore your original data and restart the application.

Of the two options I would definately go with the first, it's less disruptive to the system and follows a more logical progression. I'm making the assumption here that your SAN technology is switched fabric and not direct connect.

If you are using direct connect on the SAN then you would have to go a slightly different way, but both options are still open to you if you have sufficient fibre connections available.

Solaris Volume Manager (SVM) whilst fairly old is a well proven and robust tool, in some respects it's simplicity is it's greatest strength along with it's biggest limitation. In this case it would have made the migration to new disk a simple task, I have successfully used it to migrate storage platforms several times without significant issues.

Regards

Gull04
Last edited by gull04; 08-14-2019 at 04:06 AM.. Reason: More Info
 

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LEARN ABOUT OPENSOLARIS

sulogin

sulogin(1M)						  System Administration Commands					       sulogin(1M)

NAME

       sulogin - access single-user mode

SYNOPSIS

       sulogin

DESCRIPTION

       The sulogin utility is automatically invoked by init when the system is first started. It prompts the user to type a user name and password
       to enter system maintenance mode (single-user mode) or to type EOF (typically CTRL-D) for normal startup (multi-user mode). The user should
       never directly invoke sulogin. The user must have the solaris.system.maintenance authorization.

       The  sulogin utility can prompt the user to enter the root password on a variable number of serial console devices, in addition to the tra-
       ditional console device. See consadm(1M) and msglog(7D) for a description of how to configure a serial device to  display  the  single-user
       login prompt.

FILES

       /etc/default/sulogin

	   Default value can be set for the following flag:

	   PASSREQ

	       Determines if login requires a password. Default is PASSREQ=YES.

       /etc/default/login

	   Default value can be set for the following flag:

	   SLEEPTIME

	       If  present, sets the number of seconds to wait before login failure is printed to the screen and another login attempt is allowed.
	       Default is 4 seconds. Minimum is 0 seconds. Maximum is 5 seconds.

	       Both su(1M) and login(1) are affected by the value of SLEEPTIME.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsr			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       auths(1), login(1), consadm(1M), init(1M), su(1M), attributes(5), msglog(7D)

NOTES

       By default, the root user has all authorizations.

       Granting the solaris.system.maintenance authorization to the Console User Rights Profile may have an undesirable side  effect  of  granting
       the  currently logged in user maintenance mode access. The solaris.system.maintenance authorization should be directly granted to appropri-
       ate users rather than through the Console User Rights Profile.

SunOS 5.11							    21 Aug 2008 						       sulogin(1M)
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