10 More Discussions You Might Find Interesting
1. Solaris
Hello Admins..
I am going through solaris volume manager guide for RAID-0 concatenation and stripes, I do not understand the concept of stripe from following example of concatenation.
There is an eample for concatenation:
# metainit d25 1 1 c0t1d0s2
d25: Concat/Stripe is setup
the... (5 Replies)
Discussion started by: snchaudhari2
5 Replies
2. UNIX for Dummies Questions & Answers
I have a machine (5.10 Generic_142900-03 sun4u sparc SUNW,Sun-Fire-V210) that we are upgrading the storage and my task is to mirror what is already on the machine to the new disk. I have the disk, it is labeled and ready but I am not sure of the next steps to mirror the existing diskgroup and... (1 Reply)
Discussion started by: rookieuxixsa
1 Replies
3. Solaris
Hi Friends,
I have to migrate my raid-1 volume to raid -5 online.
Can anyone please help me, If possible then send me the step by step commands for online migration.
Thanks in advance. (2 Replies)
Discussion started by: rajaramrnb
2 Replies
4. Solaris
hi all,
i have a doubt. I am doing some R & D in sun volume manager. Sun solaris 5.10 is running in my sun blade 150 sparc machine. I have attached ultrascsi storage box(6x36GB hdd's) with my machine. when i create a raid 0 striping or raid 1 mirroring the output of metastat says Dbase = No. Can... (2 Replies)
Discussion started by: kingston
2 Replies
5. Solaris
hi all
I want to practice on veritas volume manager. Is there any trial version for solaris 5.10 sparc version. If it is there, please give me the link? (1 Reply)
Discussion started by: kingston
1 Replies
6. Solaris
Hello All,
I have small doubt. It's related to SVM in solaris 10. I have created raid 0 (striping) using 3 slices of 500 MB size (default interlace value as 32KB)
d2: Concat/Stripe ---- Interlace value is 32 KB
Size: 2923830 blocks (1.4 GB)
Stripe 0: (interlace: 64 blocks)
Device Start... (1 Reply)
Discussion started by: vaibhav.kanchan
1 Replies
7. Solaris
Can somebody kindly help me to determine which one i should choose to better manipulate OS volume.
RAID manager or veritas volume manager?
Any critical differences between those two?
Thanks in advance. (5 Replies)
Discussion started by: beginningDBA
5 Replies
8. UNIX for Advanced & Expert Users
hy guys
I am new at this thread , i have installed sf 5.0 and wanted to encapsulate root disk but when i get to optionn to enter private region i get this error:
Enter desired private region length
(default: 65536) 512
VxVM ERROR V-5-2-338
The encapsulation operation failed with the... (2 Replies)
Discussion started by: charneet
2 Replies
9. Solaris
Hi all,
I have a problem with vxvm volume which is mirror with two disks. when i am try to increase file system, it is throwing an ERROR: can not allocate 5083938 blocks, ERROR: can not able to run vxassist on this volume.
Please find a sutable solutions.
Thanks and Regards
B. Nageswar... (0 Replies)
Discussion started by: nageswarb
0 Replies
10. AIX
I have a pretty basic question but I am finding my self stumped...
I am trying to find the config that shows which logical volume is mapped to which physical volume
IE:
I know that pdisk15 is mapped to hdisk17 (I only know this as it was told to me though, by IBM)
When I run: lslv -p... (5 Replies)
Discussion started by: pheusion
5 Replies
vxiod(7) Miscellaneous Information Manual vxiod(7)
NAME
vxiod - Veritas Volume Manager I/O daemon process control device
DESCRIPTION
The vxiod device in Veritas Volume Manager (VxVM) is used to control the number of volume I/O daemons active on the system. A process con-
text is necessary to implement the plex consistency recovery and writeback error handling policies for multi-plex volumes, and for continu-
ing normal I/O after a log write if the volume has logging enabled. It is also required for the plex recovery performed with a mirrored
volume in the read/writeback mode.
There are three aspects of I/O daemon operations:
o General I/O
o Error handling
o Log handling
I/O handling is achieved by an ioctl command that does not return, but instead calls the vxiod routine to wait for errors or I/O requests
and process them. When an error occurs, if there are no I/O daemons active, the I/O simply turns into a failure on that plex. If a gen-
eral I/O request is queued up when no daemons exist, then the I/O will hang forever until a daemon process is created. If I/O daemons are
active, then the I/O is put on a work queue and the daemons are awakened. A daemon takes an error request and tries to read other plexes
until a read succeeds or all plexes have been tried. Then, if the writeback facility is enabled, the daemon tries to write the good data
to each plex that failed on the read. If the write is successful, the read error is nullified. An I/O request is handled in a similar
manner.
Logging is handled in a similar manner. An ioctl command, which does not return, is issued to create a daemon for each volume which has
logging enabled. This daemon monitors two queues: one queue of I/O which was started while the log was busy (the ``log'' queue), and
another queue of requests which have been logged and now need to be started (the ``ready'' queue). I/O requests are taken from the log
queue when the log is no longer busy, and another log write is started. Completion of a log write results in all I/O requests which have
just been logged being placed on the I/O daemon's ready queue where they are immediately started.
One mechanism finds out how many I/O error daemons are running, and another mechanism allows a process to become an I/O daemon. Before a
process becomes an I/O daemon, it should close all open files and detach from the controlling tty. An I/O or logging daemon cannot be
killed except through an explicit ioctl.
FILES
/dev/vx/iod vxiod control device
SEE ALSO
vxiod(1M), ioctl(2)
VxVM 5.0.31.1 24 Mar 2008 vxiod(7)
