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February 25th, 2008 02:00

Linux connnectivity problem

Dear All,

Does anyone experience the following error about linux connnectivity?

1. disk I/O is OK. I can use the emc disk to read/write, mount/umount.
2. Use "mount /emcdisk" to mount the disk sucessfully and I have added the entry on "fstab" file
3. get a error like this
fsck.ext3: No such file or directory while trying to open /dev/sdb1 [FAILED]
*** An error occured during the file system check.

I can mount the disk normally when I keyed the root's password into maintance mode. It seems the emc disk not ready during booting system.

The host register info as following:
1. Clariion Open
2. Failover mode 0

Thanks for any reply.
Dennis Dai

2 Intern

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20.4K Posts

February 25th, 2008 07:00

great ...Dennis ..go ahead and mark this thread as Answered so other forum users can find it helpful.

2 Intern

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360 Posts

February 25th, 2008 05:00

Hi Dynamox,

Thanks for your reply first.

I have installed EMCpower.LINUX.5.0.0.157.tar.gz, but no powerdisk it can create.
There is only one path direct attached to CX3-10c due to cost issue.
finally I remove the powerpath and face mount error via fstab.

Dennis Dai

385 Posts

February 25th, 2008 05:00

Definitely need more information on the number of HBAs connected and software installed. Having the FAILOVERMODE incorrectly set could definitely cause some unusual behavior if you try to access the passive path on the Clariion array.

If would also be helpful to know if you do have a single HBA are you zoned to multiple Clariion ports or is it a 1-to-1 mapping?

2 Intern

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20.4K Posts

February 25th, 2008 05:00

do you have PowerPath on the system ? How many HBAs, zones to your storage array ?

2 Intern

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20.4K Posts

February 25th, 2008 05:00

If you use PowerPath ..failover mode needs to be set to 1. So you have one HBA? Can you zone it to SPA and SPB ?

2 Intern

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360 Posts

February 25th, 2008 05:00

I set the failover mode to 1 when I installed the Powerpath.

I set failover mode back to 0 when I remove the PP.

So it's not the issue in my case.

Is it possible the disk not ready (/dev/sdb1) during booting system?

I saw some messages error about powerpath can't find something druing booting.

Thanks,
Dennis

2 Intern

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360 Posts

February 25th, 2008 06:00

Hi Dynamox,

Is it possible add a disk lable without erase disk data?

Thank you :)

Dennis

2 Intern

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20.4K Posts

February 25th, 2008 06:00

Dennis,

you did not answer our question ..how many HBAs ..how is it zoned to Clariion ? Help us help you ;)

2 Intern

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360 Posts

February 25th, 2008 06:00

only one hba card install on Redhat 4_U2, and only one fiber cable connect to CX3-10c_SPB2.

Please advice me if any ideas.

Dennis

2 Intern

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20.4K Posts

February 25th, 2008 06:00

thanks ..so point to point ..no fibre switches involved ?

2 Intern

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20.4K Posts

February 25th, 2008 06:00

ok ...if you only have one hba ..and connected to only one SP ..failover mode needs to be set to 0. You can use this method to mount file systems based on label and not on the actual device name:


mke2fs -j -L rac_ora1 /dev/sda1

so when they mount the file system they use labels instead of devices names, that way if device changes its name ..it can still be mounted since the label remains the same. Here is my /etc/fstab

LABEL=rac_ora1 /rac/rac_ora1 ext3 defauls 1 1

2 Intern

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360 Posts

February 25th, 2008 06:00

no switch configuration in this project :)

I installed PowerPath in order to get fixed disk naming.
It prevents disk changes from system reboot.

2 Intern

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360 Posts

February 25th, 2008 06:00

Thanks for your great info for me.

I will negoiate with my client to try this and update the status ASAP.

Thank you,
Dennis Dai

2 Intern

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360 Posts

February 25th, 2008 07:00

Yes, the data is still existing. :)

2 Intern

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360 Posts

February 25th, 2008 07:00

I have tested it, and OK.

Thank you again.
Dennis
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