Create a GPT partition table and format with a large volume (solved)

Hello,
I'm having trouble creating a GPT partition table for a large volume (~6T). It is a RAID 5 (hardware) with 3 hard disk drives having a size of 3T each (thus the resulting 6T volume).
I tried creating a GPT partition table with gdisk but it just fails at creating it, stopping here (I've let it run for like 3 hours...):
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/md126.
I also tried with parted but I get the same result. Out of luck, I created a GPT partition table from Windows 7 and 2 NTFS partitions (15G and the rest of space for the other) and it worked just fine. I then tried to format the 15G partition as ext4 but, as for gdisk, mkfs.ext4 will just never stop.
Some information:
fdisk -l
Disk /dev/sda: 256.1 GB, 256060514304 bytes, 500118192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xd9a6c0f5
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 104861695 52429824 83 Linux
/dev/sda2 104861696 466567167 180852736 83 Linux
/dev/sda3 466567168 500117503 16775168 82 Linux swap / Solaris
Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes, 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes, 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/sdd: 3000.6 GB, 3000592982016 bytes, 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdd1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/sde: 320.1 GB, 320072933376 bytes, 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x5ffb31fc
Device Boot Start End Blocks Id System
/dev/sde1 * 2048 625139711 312568832 7 HPFS/NTFS/exFAT
Disk /dev/md126: 6001.1 GB, 6001143054336 bytes, 11720982528 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/md126p1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
gdisk -l on my RAID volume (/dev/md126):
GPT fdisk (gdisk) version 0.8.7
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/md126: 11720982528 sectors, 5.5 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 8E7D03F1-8C3A-4FE6-B7BA-502D168E87D1
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 11720982494
Partitions will be aligned on 8-sector boundaries
Total free space is 6077 sectors (3.0 MiB)
Number Start (sector) End (sector) Size Code Name
1 34 262177 128.0 MiB 0C01 Microsoft reserved part
2 264192 33032191 15.6 GiB 0700 Basic data partition
3 33032192 11720978431 5.4 TiB 0700 Basic data partition
To make things clear: sda is an SSD on which Archlinux has been freshly installed (sda1 for root, sda2 for home, sda3 for swap), sde is a hard disk drive having Windows 7 installed on it. My goal with the 15G partition is to format it so I can mount /var on the HDD rather than on the SSD. The large volume will be for storage.
So if anyone has any suggestion that would help me out with this, I'd be glad to read.
Cheers
Last edited by Rolinh (2013-08-16 11:16:21)

Well, I finally decided to use a software RAID as I will not share this partition with Windows anyway and it seems a better choice than the fake RAID.
Therefore, I used the mdadm utility to create my RAID 5:
# mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sdb1 /dev/sdc1 /dev/sdd1
# mkfs.ext4 -v -m .1 -b 4096 -E stride=32,stripe-width=64 /dev/md0
It works like a charm.

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Last edited by padavoine (2012-06-06 09:35:10)

padavoine wrote:
CSM in UEFI firmwares do the exact same job as normal BIOS firmware.
So it's something specific to the Mac that it's able to boot from a partition's VBR while ignoring the MBR?
The reason that warning is given is because grub-legacy modifies more than just the MBR boot code region. It can overwrite some parts of GPT header.
Not true, the instruction is given in the context of an MBR format, not in the context of a GPT format, so there's nothing to overwrite and Stage 1.5 should be safely embeddable in the post-MBR gap.
In BIOS boot (normal case in non-UEFI firmwares or CSM in UEFI firmwares) does not read the partitition table (atleast it is supposed to be dumb in this regard), it simply launches whatever boot code exists in the 1st 440-byte of the MBR region.
So again, you're saying it's specific to the Mac UEFI that it lets you choose a partition whose VBR to load, regardless of what's in the MBR?
I haven't used Macs so I can't comment on Mac firmware behaviour. But normal BIOS firmwares (legacy and CSM) launch only the MBR boot code and not the partition boot code. We need some chainload capable boot manager in the MBR to launch the partition VBR.
grub-legacy does not know anything about GPT. So when you install grub-legacy to /dev/sda, it install the MBR boot code (stage1) and stage 1.5 code to the (supposed) post MBR gap. Since there is no actual post MBR gap in GPT (which has been taken over by the header and partition table), grub-legacy does not check for GPT and it assumes the post MBR gap actually exists which is invalid in case of GPT. grub-legacy embeds the stage 1.5 code in GPT header and table region (which grub assumes to be unused post MBR gap) and thus corrupts it.
0xEF is the MBR type code for UEFISYS partition. grub stage 1 (used in grub-legacy, not in grub2) is the 440-byte boot code stored in MBR for use in BIOS boot.
That's precisely my point: with neither proper executable code in the MBR (since grub was installed to a partition, not to the MBR) nor a UEFI system partition, what does the firmware default to, and how does it know what partition to boot from?
In that case it might fallback to UEFI Shell (if it exists) or give an error similar to the case where BIOS does not find any bootable code in 440-byte MBR region.
So even with bootcamp/CSM, the disk also needs to be MBR partitioned. So Macs use something called "Hybrid GPT/MBR" ( http://rodsbooks.com/gdisk/hybrid.html ) where the MBR table is synced to match the first 3 partitions in the GPT table.
I know what Bootcamp does, and that's not what I was referring to. I was referring to standalone Vista installs. I wasn't puzzled at the fact that they were using MBR, I was puzzled at the fact that contrary to the recommendations for the standalone Arch install on the wiki (with MBR partitioning, not GPT), they didn't do anything to try and prevent Windows from writing to the MBR.
You can't prevent Windows from overwriting the MBR region. You have to re-install the bootloader (grub2/syslinux etc.) after installing Windows. That is the reason why it is recommended to install Windows first and linux later.
Thats not true. I actually find it is much easier to install Windows UEFI-GPT using USB rather than a DVD.
I haven't done it since the only UEFI system I own has no DVD drive, but I was under the impression that it was simply a matter of choosing DVD UEFI boot in the firmware's boot menu.
format the USB as FAT32 and extract the iso to it. That it.
No, thats not it, precisely, it doesn't work out of the box with a standard Windows install USB, you need to fiddle around:
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Most of the Windows isos already have /EFI/BOOT/BOOTX64.EFI file, so no need to extract the bootmgfw.efi file.
There is no difference between in BIOS booting in UEFI firmwares and BIOS booting with legacy firmware.
There has to be a difference, at least in the Mac firmware (sorry, I keep switching), since legacy firmware, AFAIK, cannot chainload a bootloader in a partition's VBR without there being some sort of "stage1" code in the MBR.
No idea about Mac EFI. Apple made a spagetti out of UEFI Spec. To actually understand how Mac firmwares work, read the blog posts by Matthew Garrett of Redhat, about his efforts in getting Fedora to boot in Macs.

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BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
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So our situation is pretty simple. We have 3 tables.
A, B and C
the model is A->>B->>C
Currently A, B and C are range partitioned on a key created_date however it's typical that only C is every qualfied with created date. There is a foreign key from B -> A and C -> B
we have many queries where the data is identified by state that is indexed currently non partitioned on columns in A ... there are also indexes on the foreign keys that get from C -> B -> A. Again these are non partitioned indexes at this time.
It is typical that we qualify A on either account or user or both. There are indexes (non partitioned) on these
We have a problem now because many of the queries use leading wildcards ie. account like '%ACCOUNT' etc. This often results in large full table scans. Our solution has been to remove the leading wildcard but this isn't always possible.
We are wondering how we can benefit from partitioning and or sub partitioning table A. since it's partitioned on created_date but rarely qualify by that.
We are also wondering where and how we can benefit from either global partitioned index or local partitioned indexes on tables A. We suspect that the index on the foreign key from C to B could be a local partitioned index.
I am also wondering what impact pushing the state from A that's used to qualify A down to C would have any advantage.
C is the table that currently we qualify with the partition key so I figure if you also pushed down the state from A that's used to qualify the set of C's we want based on the set of B's we want based on the set of A thru qualfying on columns within A.
If we push down some of those values to C and simply use C when filtering I'm wondering what the plans will look like compared to having to work all the way up from the bottom to the top before it begins qualifying A.
Edited by: steffi on Jan 14, 2011 11:36 PM

We are wondering how we can benefit from partitioning and or sub partitioning table A. since it's partitioned on >created_date but rarely qualify by that. Very good question. Why did you partition on it? You will never have INSERTS on these partitions, but maybe deletes and updates? The only advantage (I can think of) would be to set these partitions in a read only tablespace to ease backup... but that's a weired reason.
we have many queries where the data is identified by state that is indexed currently non partitioned on columns in >A ... there are also indexes on the foreign keys that get from C -> B -> A. Again these are non partitioned indexes at >this time.Of course. Why should they be partitioned by Create_date?
It is typical that we qualify A on either account or user or both. There are indexes (non partitioned) on these
We have a problem now because many of the queries use leading wildcards ie. account like '%ACCOUNT' etc. This >often results in large full table scans. Our solution has been to remove the leading wildcard but this isn't always possible.I would suspect full index scan. Isn't it?
We are also wondering where and how we can benefit from either global partitioned index or local partitioned >indexes on tables A. We suspect that the index on the foreign key from C to B could be a local partitioned index.As A is not accessed by any partition, why should C and B profit? You should look to partition by the key you are using to access. But, you are looking to tune your SQLs where the access is like '%ACCOUNT' on A. Then when there is a match. ORACLE joins via your index and nested loop (right?) to B and C.
I am also wondering what impact pushing the state from A that's used to qualify A down to C would have any >advantage.Why should it. It just makes the table and indexes larger => more IO.
C is the table that currently we qualify with the partition key so I figure if you also pushed down the state from A >that's used to qualify the set of C's we want based on the set of B's we want based on the set of A thru qualfying >on columns within A.If the access from A to C would be .. AND A.CREATE_DATE =C.CREATE_DATE and c.key like '%what I want%' which does not qualifify for a FK ;-) then, as that could be resulting in a partition scan, you could "profit". But, I'm sure that's not your model.
If we push down some of those values to C and simply use C when filtering I'm wondering what the plans will look >like compared to having to work all the way up from the bottom to the top before it begins qualifying A.So you want to denormalize A,B,C and into one table? With the same access is like '%ACCOUNT' you would get a full scan on an index as before, just the objects would be larger due to redundance and harder to maintain. In the end you would have a bad and slower design.
Maybe you explain what the problem is.
Full index scan can not be avoided, but that can be made faster by e.g. parallel query, and then the join to B and C should be a "snip" if you just identify a small subset of rows in these tables.

Creating a Kindle-friendly table of contents with pages

I'm trying to figure out how in Pages (I just recently bought it and want to use it instead of Word) to create a Kindle-friendly table of contents, so readers can click on a chapter title and go straight to that chapter, for the fiction I want to publish on Kindle. In Word I right click on Heading 1 while the chapter title is highlighted then click Update to Match Selection. Then I create a hyperlink to that chapter title to its corresponding title in the table of contents. This does not work in Pages. Do I need to use the hyperlink option in Inspector? If so I don't know how.
And does anyone know how I can create what Kindle calls "Guide Items", where Kindle users can go to from anywhere within the book?
I suppose I can write everything in Pages and then set up the table of contents and guide items in Word but it would be nice to be able to do it in Pages, thanks.
Lyle

Well there is a standard body for EPUB - http://idpf.org/epub
And, Apple furnishes the TEMPLATE - the Pages 09 TEMPLATE - automatically (supposedily) makes the TOC links which - then - you can export to EPUB.
Again, the problem I'm daling with is that the Kindle for the iPad, does not see the TOC. It des see it in the Kindle Softward for the Mac - which is different - for some reason. I have authored two books on Pages but Amazon converts my EPUB file to fit the Kindle device itself.

How can I include a MySQL table and records with the PUT of my Dreamweaver site?

I am using .php to validate a user code against one of four codes that I am providing to potential clients. They enter that code, along with a default user id and the appropriate page is then displayed for them. Everything is working fine on the desktop. I need to have this table and the records created on my remote server. I tried saving the table in the Connections folder, but that didn't help. Everytime I enter a code (valid or invalid) on the live site, I get the following message: "Table 'boundsauctions_com.promocode' doesn't exist". Is there someway to include the table and records in my Dreamweaver folders for the site?
Thanks for any help that you can offer.

You can't. Dreamweaver, or FTP for that matter has no connection to the MySQL database. If you have created a MySQL database locally and now wish to move/copy it to your server you'll need to create a back up of your local database and then log into your database on the server and then restore that back up.
An even easier way to do this, and if you are working with MySQL much at all a good investement is to get the commercial version of Navicat MySQL - this is the best MySQL administrator I've found to date and is well worth the few bucks to buy it. With Navicat you can connect to your local MySQL database and also create a connection to your remote database, then literally drag and drop your local database contents to copy them to your server. This function alone justifies buying Navicat. A huge time saver. And no I do not work for or have any share or ties to Navicat. I'd recommend something else if I knew of anything better, but so far I don't.
Hope this helps. If you need any more details let me know.
Lawrence Cramer - *Adobe Community Professional*
http://www.Cartweaver.com
Shopping Cart for Adobe Dreamweaver
available in PHP, ColdFusion
Stay updated - http://blog.cartweaver.com

Creating files from a table and placing it in a different folders based on ID Column

I have a table <tab>
<tab>
<col1> <col2> ....
ID1 Data..
ID1 Data..
ID1 Data..
ID2 Data..
ID2 Data..
ID3 Data..
I've another table which gives me information about the path where to place ID1 data and where to Place ID2 data ..so on
<tab2>
<col1> <col2>
ID1 c:\folder1\
ID2 c:\folder2\
ID3 c:\folder3\
I need to create a files like this based on the data and place it in appropriate folder. any logic to being with will be helpful.
I think I need to have a for each loop to loop through the main table, and isolate the data based on IDs and place it in an appropriate folder by doing a lookup on <tab2>..
Neil

Yes your assumption is correct
What you need is a foreach loop based on ADO.Net enumerator which iterates through an object variable created in SSIS
The object variable you will populate inside execute sql task using query below
SELECT Col1,Col2
From Table2
Have two variables inside loop to get each iterated value of col1 and col2
Then inside loop have a data flow task with oledb source and flat file destination
Inside OLEDB Source use query as
SELECT *
FROM Table1
WHERE col1 = ?
Map parameter to Col1 variable inside loop
Now link this to flat file destination
Have a variable to generate filename using expression below
@[User::Col2] + (DT_STR,1,1252) "\\" + (DT_STR,10,1252) @[User::Col1] + ".txt"
Map this filename variable to connection string property of the flat file connection manager
Once executed you will get the desired output
Please Mark This As Answer if it solved your issue
Please Mark This As Helpful if it helps to solve your issue
Visakh
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Using JHS tables and hashing with salt algorithms for Weblogic security

We are going to do our first enterprise ADF/JHeadstart application. For security part, we are going to do the following:
1. We will use JHS tables as authentication for ADF security.
2. We will use JAAS as authentication and Custom as authorization.
2. We need to use JHeadStart security service screen in our application to manage users, roles and permission, instead of doing users/groups management within Weblogic.
3. We will create new Weblogic SQL Authentication Provider.
4. We will store salt with password in the database table.
5. We will use Oracle MDS.
There are some blogs online giving detail steps on how to create Weblogic SQL Authentication Provider and use JHS tables as authentication for ADF security. I am not sure about the implementation of hashing with salt algorithms, as ideally we'd like to use JHS security service screen in the application to manage users, roles and permission, not using Weblogic to do the users/groups management. We are going to try JMX client to interact with Weblogic API, looks like it is a flexiable approach. Does anybody have experience on working with JMX, SQL Authentication Provider and hashing with salt algorithms? Just want to make sure we are on the right track.
Thanks,
Sarah

To be clear, we are planning on using a JMX client at the Entity level using custom JHS entitiy classes.
BradW working with Sarah

Create a GPT partition table and format with a large volume (solved)

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