RAID partitioning with existing data
Hi,
I'm planning on resizing my OWC Mercury Elite Qx2 (RAID 5, 8TB( 6TB)) to 1TB partitions each in order to avoid the FW800 issue, which slows the port speed down. Only problem is, there's a fair amount of data on the drives (approx. 65% used space).
Now I'm not sure, whether it is safe or not to repartition with the data on it. I got a backup of all the files, but all on different drives. Recopying them to the RAID would be a pain.
I tested the above with a 2TB (half full) drive creating three partitions. The speed increased significantly up to 20%. Do you think I could achieve the same with a RAID5 or are there other issues involved I haven't thought of?
Any hint would be greatly appreciated.
There are lots of workarounds:
Use Disk Utility running from a DVD.
Use Disk Utility running from an external drive.
Use Disk Utility running from another Mac using FireWire target disk mode.
Split the source mirror, remove one source drive and copy from one instead of the Mirrored pair.
Copy the mirrored pair onto a backup. Remove the pair and restore from the backup.
depending on which Mac model you have, use Optical drive connectors (2009 or later) or "hidden" ODD connectors to add an additional drive.
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There is 1 drive with existing data on your LenovoEMC px6-300d.
Hi,
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I have spoken to an admin who reported this issue today in the morning. He has told me that he had spotted the problem on 7:03 am when one of virtual machines with a drive on px6 failed. He was waiting and on 8:29 am he restarted the device and after restart he started storage verification. When it finished (7:33 pm) he again restarted the device. There are no new error events in the event log, however I cannot see any data on the device.
When I click on drive 1 in Drive Management, I get a message "This drive contains existing data that must be overwritten before it can be used. Are you sure you want to overwrite the existing data?"
Does it mean that before RAID rebuild px6 requires approval to delete the drive with recoverable error (as seen on6:46 am in event log) and rebuild RAID? Should I click YES? I hope I will not loose the data.
Best regards,
MarcelHello vinaykumaar
I recommend that you power down the unit and swap the affected hard disk to another drive bay to see if that prevents the unit from restarting.
Then try allowing the unit to overwrite the specific drive. On a px unit this would be done via the storage pool information overview under drive management. On a ix unit you would go to Drive Management>Settings, check the "add disks to storage system..." then click apply. This will overwrite the disk marked by the green stripes.
If the above options do not help I recommend that you contact Lenovo Support in your region for further assistance.
LenovoEMC Contact Information is region specific. Please select the correct link then access the Contact Us at the top right:
US and Canada: https://lenovo-na-en.custhelp.com/
Latin America and Mexico: https://lenovo-la-es.custhelp.com/
EU: https://lenovo-eu-en.custhelp.com/
India/Asia Pacific: https://lenovo-ap-en.custhelp.com/
http://support.lenovoemc.com/ -
Autofilling cells with existing data above in column? Numbers 2.0 did it, seems lost in 3.0
Hello,
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Hi
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The "greater than" piece is taken care of by the "values less than" definition of the partition prior to the one being added.
If I understand your question, you have a partition with a date range ending prior to '01-feb-2007' and another partition with a date range ending prior to '01-mar-2007' and you would like to add a partition to cover the date range of 01-jan-2007 through 15-feb-2007? If so that is not possible and would be a different table all together. If you need to adjust the date ranges of current partitions, you could split the february partition, then merge the january partition with the newly split first 1/2 of february. Or if you need a mechanism to focus in on that date range, perhaps a materialized view of the target table specifying that date range. -
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Hi All,
I am few tables with data, I need to Partition the table without affecting existing table values is it possible?.
if yes then Please suggest me some ideas to archive that..
Thanks & Regards
SamiHi All,
I Need to partition for existing table with 1 million records
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2.Second partition should created for 1 year.
3.So as of now we have 6 months Data in production + another 6 months data in First partition + another 1 year data in Second partition.
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kindly provide your valuabe suggestion.
Thanks & Regards
Sami -
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Creating a mirrored raid set with a hard drive that already has data on it.
I have a hard drive that I keep my photos on, and want to create a mirrored raid set that includes this drive, with its data, and another drive. How can I do this without erasing the drive with my photos on them? I am running 10.7.5 if that matters.
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I have an iPhone 3gs and will be getting a new iPhone 4s. Once I have updated my existing 3gs with iCloud and backed up to my computer, will I be able to transfer my existing data to my new 4s using iCloud or will I need to do this from my iMac.
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How to Implement 30 days Range Partitioning with Date column. Not Interval
Hi,
I am using the db:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit
Current table structure is:
CREATE TABLE A
a NUMBER,
CreationDate DATE
PARTITION BY RANGE (CreationDate)
INTERVAL ( NUMTODSINTERVAL (30, 'DAY') )
(PARTITION P_FIRST
VALUES LESS THAN (TIMESTAMP ' 2001-01-01 00:00:00'))
How can I define virtual column based partitioning with RANGE partitioning without using INTERVAL partitioning.
And that is with Intervals of 30 days.
For monthly I am trying as
CREATE TABLE A
a NUMBER,
CreationDate DATE,
monthly_interval date as (to_char(CreationDate,'MM-YYYY')) VIRTUAL
PARTITION BY RANGE (monthly_interval)
partition p_AUG12 values less than (to_date('08-2012','mm-yyyy')),
partition p_SEP12 values less than (to_date('09-2012','mm-yyyy')),
partition p_OCT12 values less than (to_date('10-2012','mm-yyyy'))
Enable ROw Movement
BUT CAN'T INSERT the data even for that:
Insert into a (a, CreationDate)
Values (1, '12-10-2012')
Insert into a (a, CreationDate)
Values (1, '12-10-2012')
Please suggest..Hi rp,
Interval Partitioned to Range. Created Daily Partitions from Monthly Part. got complicated so I am posting here.
Basically,
I know Interval Partitioning is a kind of Range partitioning. But explicitly for Interval Partitioned tables XML Indexes are not allowed as discussed here:
XMLIndexes on an Interval Partitioned Table??
I can do monthly partitions as :
CREATE TABLE A
a NUMBER,
CreationDate DATE,
monthly_interval varchar2(8) as (to_char(CreationDate,'MM-YYYY')) VIRTUAL
PARTITION BY RANGE (monthly_interval)
partition p_AUG12 values less than ('09-2012'),
partition p_SEP12 values less than ('10-2012'),
partition p_OCT12 values less than ('11-2012')
) Enable ROw Movement
Insert into a (a, CreationDate)
Values (1, '12-SEP-2012')
Insert into a (a, CreationDate)
Values (1, '14-SEP-2012')
Select * from A partition (p_SEP12)
Select * from A partition (p_AUG12)
Select * from A partition (p_OCT12)
Can we do it for 30 days partitions, instead of the monthly partitions. ANY suggestions..
Thanks.. -
The 'Partition' with 'ID' = 'FAC2CRDN' doesn't exist in the collection.
Hi,
When I am importing csv file system is showing me the following error:
[Admin-ProcessPartition]The 'Partition' with 'ID' = 'FAC2CRDN' doesn't exist in the collection.
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Regards,
StanislavI would suggest you the following steps in order to see if your problem is fixed or if you still have some errors:
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Regards,
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