Raw I/o Post: 302142095

Sponsored Content

Operating Systems AIX Raw I/o Post 302142095 by bakunin on Wednesday 24th of October 2007 10:15:14 AM

10-24-2007

Registered User

The problem is there is not a single solution to this, so i give you a list of options you have in order of preferability (is this a word? english is not my native language):

SCSI-disk and native SSA-disks (not SSA-RAID-volumes, etc.) have an attribute called "size_in_mb", which you could read. Example: to get the size of hdisk0 you can type (and get this sample information for a 18GB disk)

Code:

# lsattr -El hdisk0 -a size_in_mb
size_in_mb 18200 Size in Megabytes False

If the disk in question is in a volume group you can find out with lspv like this (output is exemplary):

Code:

# lspv hdisk4
PHYSICAL VOLUME:    hdisk4                   VOLUME GROUP:     joker_int_vg
PV IDENTIFIER:      000bf05d981228ff VG IDENTIFIER     000bf05d95422f4d
PV STATE:           active                                     
STALE PARTITIONS:   0                        ALLOCATABLE:      yes
PP SIZE:            64 megabyte(s)           LOGICAL VOLUMES:  4
TOTAL PPs:          1093 (69952 megabytes)   VG DESCRIPTORS:   2
FREE PPs:           130 (8320 megabytes)     HOT SPARE:        no
USED PPs:           963 (61632 megabytes)    MAX REQUEST:      256 kilobytes
FREE DISTRIBUTION:  00..00..00..00..130                        
USED DISTRIBUTION:  219..219..218..218..89

you could also use bootinfo, BUT: bootinfo is usually only executable by root, whereas lsattr is executable by everybody AND the bootinfo command won't work on some disks.

I hope this helps.

bakunin

bakunin

View Public Profile for bakunin

Find all posts by bakunin

8 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

raw partitions

i want to know, how do i to create a rwa partttions in unixware 7 wit raid 5 best regards felix arteaga

2. UNIX for Advanced & Expert Users

Raw vs. Filesystem?

Maybe this is the wrong forum to start this debate and I apologize if it is, but I have been wondering for some time which is better to use for a database, raw or filesystem? By better I mean don't just mean better performance but also ease of maintenance, etc. I know that several years ago it...

3. Solaris

About raw partition

Hi I have solaris 8 installed on Intel machine. the disk I have is IDE. I would like to know how can I create a raw partition on an IDE disk. Regards, Raja

4. UNIX for Dummies Questions & Answers

raw disk

What do u mean by raw and cooked disk? What are the advantages of having raw disk? Thanks n regards,

5. UNIX for Dummies Questions & Answers

Using the Raw command

Hi, What is a Raw command and how does it work? We have to print out a large report from our database numerically and wanted to know how it can be done. :confused:

6. Filesystems, Disks and Memory

Raw volumes

The query is as follows : A typical server configs when using Oracle or any other type of DB is to install the OS + DB binaries on the internal disks of the relevant server e.g. Disk 1 : OS + SW + DB binaries Disk 2 : Mirror of disk 1 (used for resiliency) Then one uses an external array...

7. Red Hat

Raw Devices

Can you please modify my script. This script is not working for i in /dev/sdf do /bin/raw /dev/raw/`/bin/basename ${i}` ${i} /bin/sleep 2 /bin/chown orasm:ordba /dev/raw/`/bin/basename ${i}` /bin/chmod 660...

8. UNIX for Beginners Questions & Answers

Specify the raw format

Hey friends, i am trying to set up a raspbian wheezy vm on ma Unbuntu using qemu. when i try to run the setup command the error is: i tried to find something here in the forum but did not find anything. i was searching like 15 min pls dont roast me if there is a post explaining it. :)...

LEARN ABOUT HPUX

vxconfigbackupd

vxconfigbackupd(1M)													       vxconfigbackupd(1M)

NAME

       vxconfigbackupd - disk group configuration backup daemon

SYNOPSIS

       vxconfigbackupd [-l]

DESCRIPTION

       The vxconfigbackupd daemon automatically backs up information about a disk group's new configuration whenever the configuration is changed.

OPTIONS

       -l	 Logs backup daemon activities to the file /etc/vx/cbr/bkdaemonLog.

FILES

       /sbin/init.d/vxvm-recover
		 Startup file for vxconfigbackupd.

       /etc/vx/cbr/bk/dgname.dgid/dgid.dginfo
		 Location of backup file for disk group information.

       /etc/vx/cbr/bk/dgname.dgid/dgid.diskinfo
		 Location of backup file for disk attributes.

       /etc/vx/cbr/bk/dgname.dgid/dgid.binconfig
		 Location of backup file for binary configuration copy.

       /etc/vx/cbr/bk/dgname.dgid/dgid.cfgrec
		 Location of backup file for configuration records in vxprint -m format.

NOTES

       The vxconfigbackup command can be used to back up a disk group's configuration manually at any desired time.

       The  disk  group  configuration	backup and restore utilities do not save any data in the public region. This includes file system or other
       application data that is configured within VxVM objects.

       When a disk group is destroyed, its configuration backup information (including the backup directory) is also removed.  The only  exception
       to this behavior is when the disk group is in the precommit state of restoration.

       The  backup  directory should be large enough to accommodate copies of all the currently imported disk groups. The minimum recommended size
       of the backup directory is P * (N + 1) megabytes, where P is the private region in megabytes (by default, 32MB), and N  is  the	number	of
       disk  groups. The additional P megabytes is required to hold a temporary copy of the disk group configuration when a disk group is imported
       or a configuration change is made.

       The default backup directory is /etc/vx/cbr/bk.	The location of the backup directory can be configured	by  using  the	vxconfigbackup	-l
       backup_directory_path command.

SEE ALSO

       vxconfigbackup(1M), vxconfigrestore(1M)

VxVM 5.0.31.1							    24 Mar 2008 					       vxconfigbackupd(1M)