Question on OAS Disaster Recovery with Disk Replication

Dear all,
We are reviewing OAS - DR approach with Disk Replication. From the docs I read that that we need to use external storage for this purpose.
Besides that, do we need other 3rd party software/hardware to implement DR with Disk Replication ?
Thank you very much,
xtanto

No double posting.
Close the open thread before opening a new one with the same info.
Read the "Rules of Enagagement"
Regards
Juan

Similar Messages

Disaster Recovery with different ASM diskgroups

Hi@all,
actually I'm trying to test a Disaster Recovery Scenario. At a Oracle Linux 6 server with installed Grid Infra 12c and Ora Database 11.2.0.4 (there is also a 12.1.0.2 database instance) I'm trying to do a disaster recovery. But I'm getting wild by restoring and recovering the database. The problem here is, that the ASM diskgroup name has changed. As you read out I also switched the physical server, but I think that shouldn't be any problem.
At the old server I've two ASM diskgroups "+DATA" and "+FRA_1", at the new they're called "+DATA_SRVNAME" and "+FRA_SRVNAME". I've already changed the startup parameter in spfile, but now after restoring the controlfile RMAN has the directions to the old diksgroup:
RMAN> report schema;
using target database control file instead of recovery catalog
RMAN-06139: WARNING: control file is not current for REPORT SCHEMA
Report of database schema for database with db_unique_name SID
List of Permanent Datafiles
===========================
File Size(MB) Tablespace           RB segs Datafile Name
1    0        SYSTEM               ***     +DATA/SID/datafile/system.438.816606399
So I've tried three ways. First was to rename the datafile name:
ALTER DATABASE RENAME FILE '+DATA/SID/datafile/system.438.816606399' TO '+DATA_SRVNAME/SID/datafile/system.438.816606399';
Second was to set the newname in RMAN:
set newname for datafile 16 to '+DATA_SRVNAME/SID/datafile/mms_basic_tab.455.816617697/';
And second was to recreate the controlfile with
CREATE CONTROLFILE REUSE DATABASE "SID" RESETLOGS ARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 254
    MAXINSTANCES 1
    MAXLOGHISTORY 1815
LOGFILE
GROUP 1 ('+DATA__SRVNAME', '+FRA_SRVNAME') SIZE 1024M,
DATAFILE
'+DATASRVNAME/SID/datafile/system.438.816606399',
CHARACTER SET AL32UTF8;
But all three methods gave me the error, that the datafile at the new location isn't available (example):
ORA-15012: ASM file '+DATA_QUM169/cogn11/datafile/system.438.816606399' does not exist
So now my question to you: How am I able to tell the controlfile or database to use the other ASM diskgroup?
I know, easiest way would be to create a diskgroup +DATA and do the restore / recover, but at the new server I've no more storage to assign to a new diskgroup and because of there are running other instances I would'nt change the ASM diskgroups.
Did you have anny solution?
Thanks a lot and Regards,
Dave

Please try this
RMAN> run
set newname for datafile 1 to '+DATA_SRVNAME';
restore datafile 1;
switch datafile 1;
recover datafile 1;
Did you created +DATA_SRVNAME diskgroup?
and

Apps 11i disaster recovery with hot standby db

Hello,
We are trying to formulate a disaster recovery plan for Apps 11i (single node install) utilizing a hot standby database for the db layer and file synchronization
(rsync, rcp, whatever) of the application stack. We're comfortable with the hot standby db technology, but uncertain that simply keeping the application stack
sync'd on the standby host is sufficient to have a complete failover solution. Is anyone successfully using this type of configuration and , if so, is there a
cookbook methodology for promoting the standby system to a primary? Can you simply rename the host on the standby and turn the key on?
Thanks for any/all suggestions.
Terry Riddle

Hi,
we are planning a similar recovery strategy. Where can I find documentation about your strategy? A consultant has suggested has to install Legato with two products for DBs synchronization.
Thanks Gigi
My email: [email protected]

"Disaster Recovery with Messaging server"

Suggest a better solution for load balancing on Netscape Messaging Server. Also for disaster recovery - in case one server goes down.

Better solution than what? Nothing? Use a cluster for the mail store. Use more than a single server for the other components and use a load balancer as the front end for those services.

Recovery with disk

I bought my HP desk top last year, It stopped working a few weeks ago. I called HP and ordered a recovery package. I got 4 disks, 3 for recovery. I put first one in and booted, and then all three disk in one by one as requested. (Everything seems fine. I did all the hard ware tests all passed OK.)
After a few time restart the windows 7 automatically, the window 7 started the final one time set up,with blue screen tell me it will take a long time and don't disturb. that set up keep running for a long time but never stop, just keep going. I waited till two this morning it is the same and the blue screen with 3 green squares moves again and again. So I went to sleep. after I got up this morning it was the same. I tried again, booted with the recovery disk and checked all the test once more, every thing passed fine as before.
I rerun the recovery disk and same ting happens again, the finalizing set up won't stop. what can I do? Since I bought it over a year already, I need some help. any help will be highly appreciated.

Hello 1203ccc, You might try to run the HP Restore Recovery from the hard drive D: Factory partition, and see if the system will restore.
To do this, when the system boots and the HP Logo screen appears, start tapping the F-11 key and the HP Recovery Restore Utility may start. If it does, select the destructive method and the hard drive will be formated and wiped clean and the Recovery process should proceed.
It is always possible you could have a faulty hard drive that is preventing the system recovery.
Please click the White Kudos star on the left, to say thanks.
Please mark Accept As Solution if it solves your problem.

SQL Server 2005 High Availability and Disaster Recovery options

Hi, We are are working on a High Availability & Disaster Recovery Planning solution for an application database which is on SQL Server 2005. What different options have we got to implement this for SQL Server 2005 and after we have everything setup how
do we test the failover is working?
Thanks in advance.........
Ione

DR : Disaster recovery is the best option for the business to minimize their data loss and downtime. The SQL server has a number of native options. But, everything is depends upon your recovery time objective RTO and recovery point objective RPO.
1. Data center disaster
Geo Clustering
2. Server(Host)/Drive (Except shared drive) disaster
Clustering
3. Database/Drive disaster
Database mirroring
Log shipping
Replication
Log shipping
Log shipping is the process of automating the full database backup and transaction log on a production server and then automatically restores them on to the secondary (standby) server.
Log shipping will work either Full or Bulk logged recovery model.
You can also configure log shipping in the single SQL instance.
The Stand by database can be either restoring or read only (standby).
The manual fail over is required to bring the database online.
Some data can be lost (15 minutes).
Peer-to-Peer Transactional Replication
Peer-to-peer transactional replication is designed for applications that might read or might modify the data in any database that participates in replication. Additionally, if any servers that host the databases are unavailable, you can modify the application
to route traffic to the remaining servers. The remaining servers contain same copies of the data.
Clustering
Clustering is a combination of one or more servers it will automatically allow one physical server to take over the tasks of another physical server that has failed. Its not a real disaster recovery solution because if the shared drive unavailable we cannot
bring the database to online.
Clustering is best option it provides a minimum downtime (like 5 minutes) and data loss in case any data center (Geo) or server failure.
Clustering needs extra hardware/server and it’s more expensive.
Database mirroring
Database mirroring introduced in 2005 onwards. Database Mirroring maintain an exact copy of a database on a different server. It has automatic fail over option and mainly helps to increase the database availability too.
Database mirroring only works FULL recovery model.
This needs two instances.
Mirror database always in restoring state.
http://msdn.microsoft.com/en-us/library/ms151196%28v=sql.90%29.aspx
http://blogs.technet.com/b/wbaer/archive/2008/04/19/high-availability-and-disaster-recovery-with-microsoft-sql-server-2005-database-mirroring-and-microsoft-sql-server-2005-log-shipping-for-microsoft-sharepoint-products-and-technologies.aspx
http://www.slideshare.net/rajib_kundu/disaster-recovery-in-sql-server
HADR Considerations
Need to Understand the business motivations and regulatory requirements that are driving the customer's HA/DR requirements. Understand how your customer categorizes the workload from an HA/DR perspective. There is likely to be an alignment between the needs
and categorization.
Check for both the recovery time objective (RTO) and the recovery point objective (RPO) for different workload categories, for both a failure within a data center (local high availability) and a total data center failure (disaster recovery). While RPO and
RTO vary for different workloads because of business, cost, or technological considerations, customers may prefer a single technical solution for ease in operations. However, a single technical solution may require trade-offs that need to be discussed with
customers so that their expectations are set appropriately.
Check and understand if there is an organizational preference for a particular HA/DR technology. Customers may have a preference because of previous experiences, established operational procedures, or simply the desire for uniformity across databases from
different vendors. Understand the motives behind a preference: A customers' preference for HA/DR may not be because of the functions and features of the HA/DR technology. For example, a customer may decide to adopt a third-party solution for DR to maintain
a single operational procedure. For this reason, using HA/DR technology provided by a SAN vendor (such as EMC SRDF) is a popular approach.
To design and adopt an HA/DR solution it is also important to understand the implications of applying maintenance to both hardware and software (including Windows security patching). Database mirroring is often adopted to minimize the service disruption
to achieve this objective.
HADR Options :
Failover clustering for HA and database mirroring for DR.
Synchronous database mirroring for HA/DR and log shipping for additional DR.
Geo-cluster for HA/DR and log shipping for additional DR.
Failover clustering for HA and storage area network (SAN)-based replication for DR.
Peer-to-peer replication for HA and DR (and reporting).
Backup & Restore ( DR)
keep your server DB backups in network location ( DR)
Always keep your sql server 2005 upto date, in case if you are not getting any official support from MS then you have to take care of any critical issues and more..
Raju Rasagounder Sr MSSQL DBA

My Late 2013 iMac with Yosemite 10.10.2 randomly shuts down and displays a grey screen with a flashing question mark folder. According to Disk Utility, my drive is OK. What should I do?

I've had this problem for a while and I thought it went away. I've looked at all of the other discussions and tried what they suggest, nothing. I preferably don't want to erase everything on here. Is there a way to fix it without having to do that? I also noticed that other people have the screen when they first boot their computer. Mine are in the middle of a college essay or browsing online. I would really like to fix this issue. I haven't even had my iMac for a year yet. Any suggestions?

Question (?) Mark, Blinking Folder, or Gray Screen at Startup
These are related but not identical issues. Their causes are outlined in Intel-based Mac- Startup sequence and error codes, symbols. Solutions may be found in:
A flashing question mark appears when you start your Mac
Mac OS X- Gray screen appears during startup
In most cases the problems may be caused by one or more of these:
a. Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
b. Boot drive's directory has been corrupted - Repair with Disk Utility.
c. Critical system files are damaged or deleted - Reinstall OS X.
d. The disk drive is physically non-functional - Replace the hard drive.
Note that the information I have provided is what Apple recommends, If other users suggest different solutions than found here, then be sure what they recommend does not impact on your warranty, if any, or ability to get continuing Apple service.
Please don't start removing drives or changing cables unless you know what you are doing and have exhausted other non-invasive alternatives outlined here. If you perform any work yourself that is unapproved by Apple, then you will void any warranty you may have and lose all further Apple Support.
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
The main difference if you are using Lion or Mountain Lion is that you must first boot from the Recovery HD. Simply boot from the Recovery HD to perform the above.
Reinstall Snow Leopard Without Erasing The drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Reinstalling Lion/Mountain Lion Without Erasing The Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Disaster recovery question

Your forum was recommended for my question/issue
We have two semi-annual disaster recovery tests annually. The pre-test process is composed of restoring the Disaster Recovery Client from the Production client, and allowing one set of users to perform their process procedures on the DRS server, while the other users continue normal business operations on the PRD server.
Earlier this year we upgraded from SAP 4.0b --> 4.7c.
During our first disaster recovery test this year users received a message 'change and transport system not configured' . They were able to continue master data updates, even though they received the message.
We would like to have a real disaster recovery test where we switch from the production system to the disaster recovery system (DRS) and continue our business operations from that server (DRS)(located in another state).
<u><b>What must be done to perform this switchover/switchback process between the two clients once the test is completed</b></u>?

If I interpreted you correctly: you want to bring up a DR-copy of the PRD system on another server. Then let a limited number of users test this one while all other users continue normal operation on the PRD server.
Be aware that it is pretty dangerous to have both servers running at the same time
You're main concern will be to isolate the DR system from the PRD system and interfacing systems !!!
The result will not be 100% correct:
- it will not be possible to test all interfaces - thus not all business functionality...
the main obstacle with failover systems is interfaces.
- you will not be able to see if the DR system can handle the load
you will not see if the server and/or infrastructure is sufficient
P.S. Remember that the interfacing go both ways.
- You want someone to reach the system - as such you will need to open access into the DR system...
but - you will want "only a limited number of users" to do it.. as such you must play around with SAP logon and/or DNS/IP addresses.
- You do NOT want the DR system to update the PRD system (or send out info to any other partners)
as such - you must restrict outbound traffic from the DR system.
If you do not know what/where to isolate... then rip out the network cable and place the users next to the server

Fusion Middleware, Disaster Recovery Sites with Oracle Applications

I have oracle applications EBS R12.x.x deployed with one disaster recovery site. I have some composite applications built on SOA 11g suite deployed at OFM which is taking care of my EBS R12.x.x (not disaster recovery site) instance. When my EBS R12.x.x down, is it possible that services deployed at OFM starts taking care of my disaster recovery site.
Regards

There really aren't any stupid questions, just dumb answers :-)
Have taken a look at B/R section in Admin Guide?
For 10.1.3.x refer this:
http://download.oracle.com/docs/cd/B32110_01/core.1013/b32196/part5.htm#i436649
For 10.1.2.x refer this:
http://download.oracle.com/docs/cd/B14099_19/core.1012/b13995/part5.htm#i436649
Hope this will help.
Thanks
Shail

I'm trying to restore my win7 with HP USB Recovery Flash Disk I get the following two messages

I'm trying to restore my win7 with HP USB Recovery Flash Disk I get the following two messages:
"Fail to Create C:\Users\User\AppData\Local\Temp; c:\arc\01Script\FormatUFD.sp" and messsage "Fail to create".
How do I port HP_recovery drive to my flash-drive?
Windows 7 x64, HP G62-144DX
This question was solved.
View Solution.

Hi:
I can't help you with that specific issue, but if you can't get it resolved and you can read the 25 character Microsoft Windows product key on the bottom of your PC, make your own W7 installation media to reinstall W7.
Here's how:
If you can read the 25 character Microsoft windows 7 product key, you can download plain Windows 7 ISO files to burn to a DVD for the version of windows that came installed on your PC, and that is listed on the Microsoft COA sticker on your PC's case.
Burn the ISO using the Burn ISO option on your DVD burning program and burn at the slowest possible speed your program will allow. This will create a bootable DVD.
Or use the Windows 7 USB/DVD installation tool to compile the ISO file you download from Digital River. Link and instructions below. You need a 4 GB flash drive to use the USB method of compilation.
http://www.microsoftstore.com/store/msstore/html/pbPage.Help_Win7_usbdvd_dwnTool
Use the 25 character product key on the PC to activate the installation.
The key will activate either a 32 or 64 bit installation.
Then go to the PC's support and driver page to install the drivers you need.
Link to the W7 ISO file downloads is below.
http://www.mydigitallife.info/official-windows-7-sp1-iso-from-digital-river/
Paul

How to completely erase ( no recovery partition remaining) a lion partition with disk utilities on lion install disk?

Where in a lion install disc made from the installer can I find a bootable file with disk utilities?
I downloaded lion a few hours ago and installed.
I have 4 large hardrives (1.5TB) arranged in 8 partitions to allow me to work on a varied group of projects. I have some projects that need to be worked on with software running under Tiger, some with software that runs under leopard, some with snow leopard, and now Lion. I own multiple copies of software and multiple user pack system install discs.
On a regular basis, I back up chunks of work on projects to external discs, and special backup areas on one of my drives. I don't like using time machine because I am running many operating environments on my mac pro and I don't ever want to be tied to one operating environment for important functionality, and I want to maximize the open space on my hard drives.
Several partitions involve large video files. I am working on them in various versions of final cut, premiere and imovie. Because I have to use the same software versions my different clients are running, I don't want to move all the files " up" to a modern version. It would be professional suicide to stop accommodating my various clients. I say this to try to head off being told to make my clients upgrade. There are too many different clients and they are not going to replace all their equipment.
On these volumes with video files, I often fill them up and copy off what I need to backup before I erase and do a clean install. I also run VM Fusion and windows XP. I absolutely do not want to have a Recovery HD partition left on the drive when I erase or influencing the other partions using different OS versions on that same drive.
Is there a bootable disc on the installer disk I just made? Can I use the disk utilities to do a low level erase on the lion volume that will remove the recovery partition?
Can I go back to booting from Snow Leopard and erasing the Recovery partition with the drive partition that way? Will the Snow Leopard utility take out the Lion HD recovery partition?
I am used to erasing my drives and rebuilding my machine and I believe it is the right way to use my multiple drives in my workflow. Now that I've got this invisible recovery partition, can you help me remove it and create a bootable disc that includes disk utilities?

I assume the unix pdisk command will show you want is going on.
You may not have a big worry. There have always been a lot of hidden partitions. Disk Utility under 10.4.11 reports this drive has three (my now report four ) partitions, when pdisk reports that there are 15.
Macintosh-HD -> Applications -> Utilities -> Terminal
Press return when done typing sudo pdisk -l
-l include a lower case L
The sudo command will ask for your administration password. No characters will appear when typing your password. Press return when done typing. sudo stands for super user do. It's just like root. Be careful.
mac $ sudo pdisk -l
Password:
Partition map (with 512 byte blocks) on '/dev/rdisk0'
#:                type name                    length   base      ( size )
1: Apple_partition_map Apple                       63 @ 1
2:      Apple_Driver43*Macintosh                   56 @ 64
3:      Apple_Driver43*Macintosh                   56 @ 120
4:    Apple_Driver_ATA*Macintosh                   56 @ 176
5:    Apple_Driver_ATA*Macintosh                   56 @ 232
6:      Apple_FWDriver Macintosh                  512 @ 288
7: Apple_Driver_IOKit Macintosh                  512 @ 800
8:       Apple_Patches Patch Partition            512 @ 1312
9:     Apple_Bootstrap untitled                  1954 @ 149319048
10:           Apple_HFS Apple_HFS_Untitled_1   2254440 @ 263968    ( 1.1G)
11:     Apple_UNIX_SVR2 untitled               6617188 @ 149321002 ( 3.2G)
12:           Apple_HFS Apple_HFS_Untitled_2 146538496 @ 2780552   ( 69.9G)
13:     Apple_UNIX_SVR2 swap                    363298 @ 155938190 (177.4M)
14:          Apple_Free Extra                   262144 @ 1824      (128.0M)
15:          Apple_Free Extra                   262144 @ 2518408   (128.0M)
Device block size=512, Number of Blocks=156301488 (74.5G)
DeviceType=0x0, DeviceId=0x0
Drivers-
1: 23 @ 64, type=0x1
2: 36 @ 120, type=0xffff
3: 21 @ 176, type=0x701
4: 34 @ 232, type=0xf8ff

Disk Utility in Lion 10.7.4 for Bare Metal Disaster Recovery??

We just got our 15" Macbook Pro back from repair of a catastrophic hard disc failure. Wow. An older Seagate Momentus XT 500 toasted its little self. It seems most of our data are intact. If any software on the *new* hard disc get corrupted, we need a fairly straightforward disaster recovery process.
I need to ask if anyone has successfully used Disk Utility to create a (bare metal) disaster recovery image of everything on their hard drive, including all their software *and* the perfectly functioning OS. We'd like to be able to restore a complete disc image of the new Seagate Momentus 750 XT - taken from a 1 TB Seagate FreeAgent GoFlex USB drive - to the Macbook.
Has anyone done this successfully? Thanks very much for your help!

Time Machine, SuperDuper and Carbon Copy Cloner are some of the utilities that will allow you to backup your disk and do a complete restore.

Disaster Recovery / HA server role count question

We are currently working on a disaster recovery plan for our on-premise Exchange 2010 environment. As of today, have a DR Office 365 site is not an option for us. Our primary datacenter that houses our Exchange 2010 SP3 servers is setup as follows.
North America
4 servers (HUB/CAS)
1 CAS Array (F5 load balanced)
4 servers (mailbox)
1 DAG, public/private networks (2 nics)
2 servers (UM)
====================================
In our secondary datacenter we currently have built out 4 servers, OS Only. My question is which roles should I place on these servers so that we don't take down our production environment if the secondary site goes offline. The secondary site
may go down from time to time for testing and I don't want our production databases to unmount because of quorum and failed votes.
I was thinking installing HUB/CAS/MB on all 4 and UM on only 1 of them. Does this work? I have read through some technet articles about the (n/2) + 1 rule, but need a little more assurance. Thanks everyone!
d

Thanks yea, I used it. I says if I have 4 mailbox servers in the primary then I should have 4 mailbox servers in the secondary. Also, not sure if this matters, but we have an even number of databases. Basically I don't want our pimrary
databases to dismount if we lose the WAN connection, temporarily, to the secondary site. Do I need an odd number of databases/servers or is 4 and 4 could for servers and 12 active/passive in the primary and 12 passive in the secondary good. Thanks
again for the information, much appreciated.
d

RAID with Disk Utility question

I've setup a RAID array in disk utility for an external SATA NAS that I have. The Silicon Image Si3132 drivers are not working for Snow Leopard (the SATARAID 5 drivers) so I've installed the base non-raid drivers for 10.6.
I'm using Disk Utility to setup the RAID for now until I get updated drivers from SI. Here's my question:
Let's just say that my Mac Pro one day decides to die and I have to rebuild a new OS on the machine. I will then have this external drive where I've configured a software RAID with Mac OS X. Will I be able to rebuild this RAID and recover the data, or will I lose all of the data if the Mac needs to be rebuilt?
The external enclosure has its own controller, but these silicon image drivers do not seem to want to work as they are kernel panicking.
Will I be able to recover the RAID config with disk utility if I rebuild the machine? My thinking is NO

You have four internal hard drives; ability to boot from FW or USB, and I would include TimeMachine and clone (Carbon Copy Cloner or SuperDuper). Some WHS NAS servers also support TimeMachine and SuperDuper, but I would have local backups. Two minimum.
I would not rely on SI or RAID.
And all you need to boot from, and I'd have at least two, is a basic 30GB partition for Mac OS: a working copy of your system as is, a copy of last version installed also, AND, one "emergency" boot partition for disk maintenance and repairs.
Then use NAS as second line of backup for your data, disk images, etc.

Synchronizing Disaster Recovery site with the production server

Hi All,
One of the customer is asking the following query:
"How Disaster recovery site can be synchronized with the production server and how do they switch? Will the web logic server do this for them?"
This customer is having two sites one live and one a DR (Disaster Recovery) site on different location.
Can somebody answer my query?
Thanks in advance.,
Regards.,
Naveen

Firstly
Is your Datagaurd Physical( Redo Apply) or Logical( SQL apply)?
Does it have Datagaurd Broker?
When Datagaurd is setup in your environment - on the primary database( live database) the Datagaurd users LGWR or/and ARCH process to collect redo data and ship this data to standby ( DR site) and the FAL process to provide client-server mechanism for shipping archived logs to standby.
On standby database, The Datagaurd users RFS process to receive redo records from primary database, the MRP process applies redo information to standby database.
If the Data Gaurd Broker is enabled, Datagaurd also used DMON process to manage and monitor both primary and standby databases as a unified configuration.
When there is any connectivity issue to the standby and when connection is re-established, the accumulated archive logs are automatically shipped and apploed to stanby, until stanby is resynchronized with the primary. This process does not require any administrative intervention.
If there is a very large Archive Gap between the primary and secondary due to some major issue. Then the unshipped archive logs need to be shipped manually from primary to standby and needs to be applied in standby to sync up with primary. For some reason there will also arise rare issues like problem with not applying of archive logs though log shipping is success. So some work arround will solve it.
Comming to planned /unplanned outages of production site.
Datagaurd has Failover and Switchover( planned ) methods, These are not automatic, but have to be explicitly initiated by the administrator( So there will be downtime but minimal). Once initiated, Datagaurd automates the processes involved.
- S K A
Edited by: user12297346 on Jan 27, 2010 7:13 AM

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