Partitions alignment using cfdisk

I have a new hard disk which have advance formatting , and I am not sure if I will cfdisk if the partitions will be aligned correctly.
is there paramers I need to give to enure the partitions are aligned or I can just use it and the partitions will be aligned?
Last edited by XDarkAngelX (2014-01-08 16:47:04)

Alber wrote:
I'm supposing a SSD.
From wiki:
Many of the common partition tools handle partition alignment automatically (assuming users are using an up-to-date version):
https://wiki.archlinux.org/index.php/So … _Alignment
Edit:
About advance formatting
http://en.wikipedia.org/wiki/Advanced_Format
https://wiki.archlinux.org/index.php/Advanced_Format
For advanced format partitioning
https://wiki.archlinux.org/index.php/Ad … Partitions
ok but do you know if cfdisk supports Aligning Partitions? as it is not menioned in the wiki and I perfer to use it over fdisk

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Imaging and partition alignment

We are using ZCM 10.3.1 and the August 2010 Imaging CD to create and
restore Windows 7 images to wiped conventional and solid state drives.
We have been running the Windows 7 Experience Index tool to check disk
performance. We are in the process of moving towards use of solid state
drives and want to be sure we are getting the best possible performance.
We have identical model laptops with the same SSD where some will score
a 7.1 on the disk performance and others will score 5.9.
In the process of doing more research on solid state drives, we came
across some info that mentioned the need to have the partition aligned
for best performance.
So far we have found that if a laptop had Windows 7 installed directly
to the solid state drive from the Windows 7 DVD, the partition is
aligned (determined by taking the partition starting offset and dividing
it by 4096 - result should be an integer if aligned). These laptops
score at least a 6.9 on the Windows 7 disk performance test.
On a laptop that had an image laid down using Zenworks the partition
always ends up misaligned. These laptops typically score a 5.9 on the
Windows 7 disk performance test.
Has anyone else noticed a partition alignment problem when using
Zenworks imaging ?

Or maybe run a chkdsk on a freshly imaged machine to see if there are
errors ?
On 10/8/2010 2:25 PM, Chris Granitz wrote:
> Does anyone have anything to offer on this ?
>
> Would someone else mind checking the partition alignment on one of their
> imaged machines ?
>
> On 10/5/2010 1:33 PM, Chris Granitz wrote:
>> Some additional info...
>>
>> We have also noticed that if we run Windows Chkdsk on a laptop that was
>> restored using a Zenworks image (conventional hard drive or solid state
>> drive), that there a lot of errors that chkdsk corrects. That is
>> particularly bothersome. Windows seems to otherwise run fine, but
>> obviously Windows is not totally happy with some aspect of the image
>> that Zenworks is laying down.
>>
>>
>> On 10/5/2010 1:12 PM, Chris Granitz wrote:
>>> We are using ZCM 10.3.1 and the August 2010 Imaging CD to create and
>>> restore Windows 7 images to wiped conventional and solid state drives.
>>> We have been running the Windows 7 Experience Index tool to check disk
>>> performance. We are in the process of moving towards use of solid state
>>> drives and want to be sure we are getting the best possible performance.
>>> We have identical model laptops with the same SSD where some will score
>>> a 7.1 on the disk performance and others will score 5.9.
>>>
>>> In the process of doing more research on solid state drives, we came
>>> across some info that mentioned the need to have the partition aligned
>>> for best performance.
>>>
>>> So far we have found that if a laptop had Windows 7 installed directly
>>> to the solid state drive from the Windows 7 DVD, the partition is
>>> aligned (determined by taking the partition starting offset and dividing
>>> it by 4096 - result should be an integer if aligned). These laptops
>>> score at least a 6.9 on the Windows 7 disk performance test.
>>>
>>> On a laptop that had an image laid down using Zenworks the partition
>>> always ends up misaligned. These laptops typically score a 5.9 on the
>>> Windows 7 disk performance test.
>>>
>>> Has anyone else noticed a partition alignment problem when using
>>> Zenworks imaging ?
>>
>

How to find out the Non Partitioned Tables used 2Gb on oracle

Hi team
how to find out the Non Partitioned Tables used > 2Gb on oracle where not is sys & system
regards

heres 1 I made earlier
set pagesize 999
set linesize 132
col owner format a25
col segment_name format a60
select owner,segment_name,segment_type,(bytes/1024/1024)"MB size"
from dba_segments
where owner not in ('SYS','SYSTEM','XDB','MDSYS','SYSMAN') -- edit for taste
and segment_type = 'TABLE'
having (bytes/1024/1024) > 2000
group by bytes, segment_Type, segment_name, owner
order by 4 asc

Has anyone figured a way to use the Magic Trackpad with Windows 7 on a partitioned disc using Bootcamp?

Has anyone figured a way to use the magic trackpad with Windows 7 on a partitioned disc using Bootcamp?

Yes. After Windows/Bootcamp discovers your bluetooth device (Magic Trackpad or Mouse, be sure to make it discoverable), right click, with your wired mouse, of course, on the icon and select Properties.
Then check the mouse drivers box and your device should work. (I located this solution on another thread)
It works for both the Magic Mouse and Magic Trackpad.
Must admit, the solution was not intuitive within the Windows environment. But we all must remember. It IS Windows, after all.
Another thing. Keep in mind that the gestures on these devices that work just dandy in OSX do not carry over into Windows.
It's Windows.

I have 2T imac running lion Can I re-partition and use one half as a back up disk?

Bought a new mac in November and it is refused to start up yesterday. Spoke with Apple and they said I should make sure I do regular back ups in case I l ose my hard drive?!?! I did a clean install of the Operating software but was advised to erase and install.
I have taken all my important stuff off and can reinstall my programs once I get to the next stage so what I am wondering is
I have 2T imac running lion Can I re-partition and use one half as a back up disk for use with time machine so that I do not have to buy an external HD?
Cheers J

You could partition the drive, I read that Time Machine will work on if you HD partition.
BUT, it will do you no good if you HD fails.
Usually, if a HD fails it's the entire drive that is dead not just a partition.
So your time machine back would be on a dead disk, useless!

Create Partition table using CTAS

Hi there,
Is it possible to create a duplicate partition table from a existing partition table using CTAS method? If yes, could you explain how ?If No , how to make a duplicate partition table?
Thanks in advance?
Rajesh Marath

Easily:
conn / as sysdba
CREATE TABLESPACE part1
DATAFILE 'c:\temp\part01.dbf' SIZE 50M
BLOCKSIZE 8192
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 256K
SEGMENT SPACE MANAGEMENT AUTO
ONLINE;
CREATE TABLESPACE part2
DATAFILE 'c:\temp\part02.dbf' SIZE 50M
BLOCKSIZE 8192
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 256K
SEGMENT SPACE MANAGEMENT AUTO
ONLINE;
CREATE TABLESPACE part3
DATAFILE 'c:\temp\part03.dbf' SIZE 50M
BLOCKSIZE 8192
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 256K
SEGMENT SPACE MANAGEMENT AUTO
ONLINE;
ALTER USER uwclass QUOTA UNLIMITED ON part1;
ALTER USER uwclass QUOTA UNLIMITED ON part2;
ALTER USER uwclass QUOTA UNLIMITED ON part3;
conn uwclass/uwclass
CREATE TABLE hash_part (
prof_history_id NUMBER(10),
person_id NUMBER(10) NOT NULL,
organization_id NUMBER(10) NOT NULL,
record_date DATE NOT NULL,
prof_hist_comments VARCHAR2(2000))
PARTITION BY HASH (prof_history_id)
PARTITIONS 3
STORE IN (part1, part2, part3);
CREATE TABLE duplicate_hash_part
PARTITION BY HASH (prof_history_id)
PARTITIONS 3
STORE IN (part1, part2, part3) AS
SELECT * FROM hash_part;Follow the same logic for list and range partitions

Partition elimination using views

Hi all,
i am having problem with a view which is accessing all the partitions in my table.
i have a table which has 30 columns and is partition by one column called cid. it is a list partition.
when i do a query on the table, the explain plan show partition (single)
ex. select * from table1 where dt=trunc(sysdate) and cid=1 and txt='123A'so the above query works fine and access one partition (value 1(
now, i created a view base on the table. it looks like this:
create or replace view view1 as
column names
select * from
      (select * from table1 where type='tek') a,
        (select * from table1 where type='pak') b
where a.userid = b.userid(+)when i issue the statement below, the explain plan show partition (all)
select * from view1 where dt=trunc(sysdate) and cid=1 and txt='123A'i cannnot seem to find a way for partition elimination using the view. can someone help how to resolve this problem?
thanks

consider the following data
user id       cid       type    name
======================
ABC           1        tek      robert
ABC           1        pak      will
TYY          1        tek       smith
TYY          1        tek       john
WWW       2        pak      mil
EEE           2        tek      Josso for example, query a is taking rows with tek value, query b is displaying rows with pak value and both query are join on user id.
abc row in quey a will join with abc row in query b and this will become one row instead of two.
so when run query the view such as select * from view1 where cid=1 then i want the view to access partition cid=1 and get the ABC and TYY rows only.
but it looks it is accessing all partitions which is not what i am looking for.
let me know if this helps

Merging/Combining Partition D into the main Partition C using Windows 7.

Can I combine both partition C and Partition D and create a larger Partition C using Windows 7?
I deleted the original Lenovo Recovery Partition Q, reformatted (NTFS) the unallocated empty Partition into a
new Partition D with 13 GB of free space. My goal is to merge Partition D (13GB) into my
main partition C (83GB) and have a larger Partition C (99GB) thus eliminating Partition D using
Windows 7 (ie. Disk Management etc.).
I really don't want to download and use any 3rd party software (ie. Partition Magid etc.) unless absolutely
necessary. I have previously posed this question on the T530 forums and the only recourse given was to
use a 3rd party Partition Software. I am posting here as my last resort before relenting and using 3rd Party Software.
BTW I have ordered from Lenovo a complete set of recovery disks for my ultimate backup and system restoration.
Thanks,
Altoid666
T530,Core i7-3820QM,16GB Ram, Intel 530 SSD 240GB, Blutooth 4.0,Ultimate-N 6300, 15.6 FHD, Nvidia NVS 5400M., All software current.,
Windows 7 Ultimate x64 , SP1. Office 2013 Professional

Yes, you can, BUT you should run the partitioning application form another storage unit (example: USB Stick).
Best regards.
IPnaSh
First Spanish Community Guru - Colaborador ad honorem

Hello, i own an i7 all in one mac. I tried to partition him using bootcamp but didn't have mac os cd neither mac instalation. the problem i am dealing now its that i cant go back to OS partition since its not appeared when i restart c and no win drivers

I tried to partition him using bootcamp but didn't have mac os cd neither mac instalation. the problem i am dealing now its that i cant go back to OS partition since its not appeared when i restart c and no win drivers to have a properly running system. I've thought as an option to re-download boot-camp and run the instalation from windows partition and see if i can repair it that way, didnt try yet thought just in case anyone has a better prposition or dealed with the same problem

Take it to your local Apple Store or AASP, it's covered by a 1 year hardware warranty. If you have AppleCare then give them a call but I'm pretty sure they will advise the same. If you have not purchased AppleCare yet please do, this will extend the warranty to 3 years however it MUST be purchased within the first year of ownership. Let it go 366 days and you are out of luck. AppleCare will also include telephone support too.
Good luck.

Setting up a LUKS partition to use a USB key

Im playing with an old netbook I've been given, essentially practicing for when I get a new desktop. Anyway, I want to install Arch on a LUKS encrypted partition and have it unlocked at boot time using a key located on a USB key.
This is what I did first time round and whilst the root partition is indeed encrypted I'm having to type a passphrase every boot:
loadkeys uk
lsblk
gdisk /dev/sda
outout should eventually look like:
Command (? for help): p
Disk /dev/sda:
Logical sector size: 512 bytes
Disk identifier (GUID):
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 8191 3.0 MiB EF02 BIOS boot partition
2 8192 1032191 500.0 MiB 8300 boot
3 1032192 8300 root
cryptsetup -v --cipher aes-xts-plain64 --key-size 512 --hash sha512 --iter-time 5000 --use-random luksFormat /dev/sda3
enter a passphrase twice here
cryptsetup open /dev/sda3 ARCHROOT
mkfs.ext4 /dev/sda2
mkfs.btrfs /dev/mapper/ARCHROOT
mount /dev/mapper/ARCHROOT /mnt
cd /mnt
Would I need to
cryptsetup luksAddKey /path/to/keyfile
after the first cyptsetup step? If so can the live Arch environment mount USB drives at this point in the installation process?

frostschutz wrote:Do you have a backup of those headers, then? Kinda sucks to lose all your data to a faulty USB key.
hehe, yes several USB keys and other secure storage.
frostschultz wrote:Security wise it shouldn't matter, if someone can modify my Initramfs, they can also modify my Grub.
The other thing I forgot to mention is that my USB stick is also my boot device. There's no Grub or any other bootloader on the target systems to mess with. If started without the key, they just say "operating system not found". Even if someone got hold of the USB stick, as a last line of defence, all the keys and headers that Grub needs (as well as the Grub boot config) is stored on an encrypted partition on the USB stick that requires a passphrase to unlock.
frostschultz wrote:
I can pull my USB stick as soon as Grub is done loading the kernel and initramfs, i.e. the moment kernel messages start to appear. They keys and all are part of the Initramfs, so the USB stick is no longer necessary.
Basically, it's this method: https://wiki.gentoo.org/wiki/Custom_Ini … ed_Keyfile and the first example here: https://wiki.gentoo.org/wiki/Custom_Initramfs/Examples
That gentoo example doesn't use systemd. I wanted to use the native systemd functionality as much as possible. My my initramfs opens what's necessary for boot (essentially the root filesystem) and the main early-boot does everything else. I wanted to use the standard /etc/fstab and /etc/crypttab and allow systemd to sort everything out but I encountered the dependency problem. I have a very simple workaround for it, however.
I'll just add to that as well that the systemd issue is only on systems where the initramfs is insecure and, therefore, cannot contain keys. Those systems with the initramfs on an encrypted filesystem don't need the usb key to unlock the rest of the encrypted filesystems because the keys are in the encrypted initramfs. They only need the USB key to unlock the root. I cannot secure the initramfs on some systems because of the way they boot (specifically, non-x86 boxes that cannot use Grub or are unable to boot off arbitrary devices).
Last edited by starfry (2015-02-07 14:09:29)

Dualboot archlinux/ubuntu on SSD, partition alignement is so fun

Hi people.
I just bought one of those shiny thing called SSD (a Crucial RealSSD C300 64GB) and planning to install Archlinux on it (along with Ubuntu as a test system for running my apps under it and as a backup system, you know for when I'll try the last feature in kernel26-git and will break every thing).
I setup the disk according Tso's numbers : H=225 S=56
I tried to align my partition by hand using a 512kiB and create the ext4 filesystems using :
mkfs.ext4 -b 4096 -E stride=128 /dev/sdaX
Frankly I think that I misunderstood the head/cylinder thing :
- I manage to install Ubuntu (I use it currently)
- but I can't assign partition to mount point in Archlinux installer: it complain about a partition that finishes half of a cylinder.
So my question are:
Should I realign my partition using H=32 S=32 or could I ignore the installer error and mounting the partition myself (and will I loose performances if I do so) ?
Bonus :
The Archlinux wiki page on SSD (http://wiki.archlinux.org/index.php/SSD … _Alignment) does advise to a blocksize of 4kiB and a stride of 128kiB when creating the filesystem. I think it would be nice to advertise on that and I'm willing to add that myself but I not so sure about SSD and partitions so comments are welcome.

Answering to myself and from the man page of ext4.
I was wrong in my previous post, maybe someone will need those informations later so I put them here :
It look like you need to customize block size and stride for raid only, so in my case I don't need it (don't remember where I read about that but I may have misunderstood something again). Furthermore it look like for a filesystem larger than 512MiB mke2fs will pickup a block size of 4kiB (as stated in the default section /etc/mk2fs.conf) of but I can't find much information on the -T usage_type parameter.
Can't someone correct me if I'm wrong ?

CUCM 9.11 to 9.12 upgrade "Partitions Aligned"

I have a customer who wants to verify if their CUCM 9.1.1 disks Partitions are Aligned prior to proceeding with the 9.1.2 upgrade. Is there a TAC approved procedure that can be performed prior to the upgrade to validate the CUCM Partitions are Aligned?

Cisco TAC provided the following procedure:
•1)      Shutdown the vm
•2)      Logged in using root username/password for ESXi
•3)      cd /vmfs/volume
•4)      ls (to list all my datastores)       Now find the datastore that you used to install the Vms
•5)      cd    Example in my lab : cd datastore2
•6)      ls (list all the VMs in the datastore)
•7)      cd “VM name”      USE quotes if your VM name contains any spaces
•8)      ls   (you should see a file with .vmdk extension. IT Will word flat before it)
•9)      fdisk –lu < filename-flat.vmdk>
The output will be something like this. The key is too look for partition to start at “128” This one does.   If its something like 63. Then its not aligned.
                  Device Boot      Start         End      Blocks Id System
CUCM 10.0 Sub-flat.vmdkp1   *       128 29753343 14876608   83 Linux
Partition 1 has different physical/logical endings:
     phys=(1023, 254, 63) logical=(1852, 15, 19)
CUCM 10.0 Sub-flat.vmdkp2      29753344 59506687 14876672   83 Linux
Partition 2 has different physical/logical beginnings (non-Linux?):
     phys=(1023, 254, 63) logical=(1852, 15, 20)
Partition 2 has different physical/logical endings:
     phys=(1023, 254, 63) logical=(3704, 30, 38)
CUCM 10.0 Sub-flat.vmdkp3      59506688 60030975    262144   83 Linux
Partition 3 has different physical/logical beginnings (non-Linux?):
     phys=(1023, 254, 63) logical=(3704, 30, 39)
Partition 3 has different physical/logical endings:
     phys=(1023, 254, 63) logical=(3736, 192, 40)
CUCM 10.0 Sub-flat.vmdkp4      60030976 167766794 53867909+   5 Extended
Partition 4 has different physical/logical beginnings (non-Linux?):
     phys=(1023, 254, 63) logical=(3736, 192, 41)
Partition 4 has different physical/logical endings:
     phys=(1023, 254, 63) logical=(10442, 254, 63)
CUCM 10.0 Sub-flat.vmdkp5      60031104 64159680   2064288+ 82 Linux swap
CUCM 10.0 Sub-flat.vmdkp6      64159744 167766794 51803525+ 83 Linux
Unknown value(s) for: cylinders (settable in the extra functions menu)

Partitioning previously used Windows NT File System for use with Mac and PC

With reference to this thread I found when searching for a solution: Can Windows NT File System(NTFS) format external hard drive work on iMac?
Below is the comment which led to me creating this new thread.
"rkaufmann87Sep 8, 2014 8:26 AM Re: Can Windows NT File System(NTFS) format external hard drive work on iMac?
in response to djj19
djj19 wrote:
Hi there,
I am about to follow your advice also for the same issue, the worry I have is that when I select partition 1, it says "To erase and partition the selected disk..." and so I am worried that if I do this it will erase the current contents of the hard disk drive (which were copied there from PCs in previous use).
If so, is there a way to use the hard disk drive with a mac without erasing the contents?
Thanks
Your case is different and NO do not partition the EHD yet unless you are prepared to completely erase your PC data. Before progressing though, do you intend to share the EHD with a PC and your Mac? If so this is not advisable but it is possible, however you will need to compromise. Please answer that question first and then we can proceed with some advice.
BTW it's generally not a good idea to ask a question in a thread that has already been answered, particularly one that is 3+ years old! In such a case it's normally better to create your own thread. "
The answer to the question in the above comment is that ideally I would like to use with both Mac and PC, why is this not advisable?
Please discuss my best options. I am wondering if I could transfer the current contents of the disk drive elsewhere, partition (which would erase) the disk drive, then put back the contents along with the new files which I have been trying to put on in the first place?
If this were to work would I then be tied down to only using this disk drive with a Mac?
Thank you.
Message was edited by: djj19

Ideally it is best to have seperate (discreet) EHD's for a PC and Mac due to their differences in HD formatting. However, this is not always feasable but there are alternative solutions availble. Among those are:
Creating and useing a Dropbox account that can be shared by PCs, Macs, IOS and Android devices. Dropbox allows for 2GB of free storage and additional storage is available for a small monthly fee.
Another possiblity is formating an EHD so that it may be shared by both a PC and Mac, this format is FAT 32. The downside of doing this is the size of the files written to the HD are limited to 4GB.

Reformat external HD and possibly partition for use with mac and pc.

Hi. I’d really appreciate some advice. I’m a new Mac (MacBook Pro mid 2012) user. I’m trying to figure out how to use a new external HD (WD My Passport) that just arrived today in connection with a digital tv media player (NBOX V3) that I use to watch videos on my tv, which is in the NTFS format. The tv box works with a flash drive that I have, which I had to reformat as FAT32. Since I tend to max out the storage on the flash drive I ordered this new hd to use as well.
When I went to reformat the new hd I didn’t see the FAT32 option. There are 4 Mac options, MS-DOS (FAT), and ExFAT to choose from. I read that ExFAT would work with both mac and pc (since I’m using OS 10.8.4 and my pc is Windows 7). I was excited about it too since I know that FAT32 has a 4gb limitation. I reformatted as ExFat first on my Mac and then on my pc. I tried both b/c I read conflicting comments about it not working when reformatting on the mac, but that it would work when done on the pc. Both times I tested the newly formatted hd on the tv box and both times it failed to recognize the files. After the failures I wondered if it was even possible for the external hd to work with the tv box, or if it had something to do with the ExFat format. So, I reformatted it on my pc to NTFS and then plugged it into the tv box, which works just fine.
I could really use some advice. I wish the hd had the FAT32 option. I’m wondering about partitioning. I really don’t know too much about it, but am wondering if this might be the answer to make everything work. I would need everything to work from my mac b/c the pc belongs to my husband (which I’m welcome to use), but all of the files that I load are from my computer (not to mention I’m already “used to” my mac and now seem to fumble around using a pc). This might sound dumb, but I was thinking that if I made 2 partitions (one that would work with my mac and one that would work with the tv box, maybe the FAT option?) then I could load files on the mac friendly partition and then transfer them to the tv box friendly partition. I’m thinking it won’t work so I wanted to find out first, plus I’ve never partitioned anything before. I also know that on another external hard drive that we have for the pc I’m not able to modify the files on it from my mac, although I can see them and extract them. I’m thinking if I partition this new hd I’ll have the same problem with the partition that is formatted as FAT.
Partitioning might not even be an option. If anyone knows a way to make what I want to do work, then I would really appreciate the advice. Thanks in advance.

Digital tv media player (NBOX V3) - NTFS, FAT32/MSDOS
Mac - HFS+, exFAT (formatted on a PC best), FAT32/MSDOS
Windows PC - NTFS, exFAT, FAT32/MSDOS
Problem is if you use FAT32/MSDOS your capped at 4GB sized files and can't use larger storage drives. The other formats have no problem.
The Mac can't write NTFS without further software being installed like Paragon NTFS
I usually try to stick with neutral formats, but if your NBOX V3 doesn't accept exFAT then your stuck.
Perhaps you should see if there is a firmware update for it that will enable exFAT, then format the drive exFAT on the PC and you should be set.

Partitions alignment using cfdisk

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