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Operating Systems Solaris solaris volume manager- stripe? Post 302671871 by snchaudhari2 on Saturday 14th of July 2012 10:31:29 PM
Old 07-14-2012
solaris volume manager- stripe?

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 explanation given is:
"This example shows the creation of a concatenation, d25, that consists of one stripe (the first number 1) made of a single slice (the second number 1 in front of the slice). The system verifies that the volume has been set up."

As far as I understand, stripe volume is access of data parallely across slices.
but from above example of concatenation, how does that number 1 comes in as stripe?

Please clear my confusion.

Thanks
 

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metaparam(1M)						  System Administration Commands					     metaparam(1M)

NAME
metaparam - modify parameters of metadevices SYNOPSIS
/usr/sbin/metaparam -h /usr/sbin/metaparam [-s setname] [ concat/stripe or RAID5 options] concat/stripe RAID /usr/sbin/metaparam [-s setname] [ mirror options] mirror DESCRIPTION
The metaparam command is used to display or modify current parameters of metadevices. If just the metadevice is specified as an argument to the metaparam command, the current settings are displayed. The metaparam command enables most metadevice (volume) parameters to be changed. Only the interlace value cannot be changed by metaparam, because it is established when the metadevice is created and cannot be changed thereafter. OPTIONS
Root privileges are required for all of the options. The following options are supported: -h Displays usage message. -s setname Specify the name of the diskset on which metaparam works. Using the -s option causes the command to perform its administra- tive function within the specified diskset. Without this option, the command performs its function on local metadevices. CONCAT
/STRIPE OR RAID5 OPTIONS -h hot_spare_pool | none Specifies the hot spare pool to be used by a metadevice. If none is specified, the metadevice is disassoci- ated with the hot spare pool assigned to it. If the metadevice is currently using a hot spare, then meta- param cannot replace the hot spare pool. concat/stripe | RAID Specifies the metadevice name of the concatenation, stripe, or concatenation of stripes, or of the RAID5 metadevice. MIRROR OPTIONS
-r roundrobin | geometric | first Modifies the read option for a mirror. The -r option must be followed by either roundrobin, geomet- ric, or first. roundrobin, which is the default action under the metainit command, specifies read- ing the disks in a round-robin (load balancing) method. geometric allows for faster performance on sequential reads. first specifies reading only from the first submirror. -w parallel | serial Modifies the write option for a mirror. The -w option must be followed by either parallel or serial. parallel, the default action under the metainit command, specifies that all writes are par- allel. serial specifies that all writes are serial. -p pass_number A number from 0-to-9 that specifies the order in which a mirror is resynced during reboot. The default is 1. Smaller pass numbers are resynced first. Equal pass numbers are run concurrently. If 0 is used, the mirror resync is skipped. 0 should only be used for mirrors mounted as read-only, or as swap. mirror Specifies the metadevice name of the mirror. EXAMPLES
Example 1: Associating Hot Spare Pool with RAID5 Metadevice This example associates a hot spare pool, hsp005, with a RAID5 metadevice, d80. # metaparam -h hsp005 d80 Example 2: Changing Read Option to Geometric This example changes the read option on a mirror d50 from the default of roundrobin to geometric. # metaparam -r geometric d50 EXIT STATUS
The following exit values are returned: 0 Successful completion. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWmdu | +-----------------------------+-----------------------------+ SEE ALSO
mdmonitord(1M), metaclear(1M), metadb(1M), metadetach(1M), metahs(1M), metainit(1M), metaoffline(1M), metaonline(1M), metarecover(1M), metarename(1M), metareplace(1M), metaroot(1M), metaset(1M), metassist(1M), metastat(1M), metasync(1M), metattach(1M), md.tab(4), md.cf(4), mddb.cf(4), md.tab(4), attributes(5), md(7D) Solaris Volume Manager Administration Guide SunOS 5.10 2 Jun 1004 metaparam(1M)
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