03-14-2013
I don't really see the point of doing so. Performance would be lower and inconsistent. Something smarter than simple mirroring or striping would be needed to get the advantages of both.
8 More Discussions You Might Find Interesting
1. BSD
Now that SSD drives are becoming mainstream, I had a few questions on installing a SSD drive in a FreeBSD environment. Can FreeBSD be made SSD aware, that is, somehow let FreeBSD know that reads and writes should be limited or deferred to extend the disk's life? Is there a setting for wear... (0 Replies)
Discussion started by: figaro
0 Replies
2. UNIX for Dummies Questions & Answers
Hi
Can someone tell me what are the differences between software and hardware raid ?
thx for help. (2 Replies)
Discussion started by: presul
2 Replies
3. AIX
Hi,
does anyone here happen to know if I could run GLVM or GPFS on Solid State Disks?
I have a high volume / high transaction Sybase HACMP cluster currently setup with SRDF to the DR datacentre. My business now considers to move everything to SSD storage but we still need to get the data to... (0 Replies)
Discussion started by: zxmaus
0 Replies
4. AIX
Hello,
I have a scsi pci x raid controller card on which I had created a disk array of 3 disks
when I type lspv ; I used to see 3 physical disks ( two local disks and one raid 5 disk )
suddenly the raid 5 disk array disappeared ; so the hardware engineer thought the problem was with SCSI... (0 Replies)
Discussion started by: filosophizer
0 Replies
5. Solaris
Server Model: T5120 with 146G x4 disks.
OS: Solaris 10 - installed on c1t0d0.
Plan to use software raid (veritas volume mgr) on c1t2d0 disk.
After format and label the disk, still not able to detect using vxdiskadm.
Question:
Should I remove the hardware raid on c1t2d0 first?
My... (4 Replies)
Discussion started by: KhawHL
4 Replies
6. Red Hat
Hello,
I want to delete a RAID configuration an old server has.
Since i haven't the chance to work with the specific raid controller in the past can you please help me how to perform the configuraiton?
I downloaded IBM ServeRAID Support CD but i wasn't able to configure the video card so i... (0 Replies)
Discussion started by: @dagio
0 Replies
7. UNIX for Dummies Questions & Answers
Hello All,
I recently received a new SSD that I am going to use for the purpose of Booting Virtual Machines. I use VMWare Player to boot Windows Guest Operating Systems onto my Linux Laptop.
I currently have a SSD drive that I use for this exact same purpose that is formatted as ext3 and I'm... (3 Replies)
Discussion started by: mrm5102
3 Replies
8. Linux
I'm running glusterfs on CentOS 6.6 two nodes, (the SSD (samsung 840 1TB x2) is RAID 0 on the HP DL380 G6) x2, and trimming is not enable on it by checking /dev/sdb1/xxxxx/discard_max_bytes=0. Do I still need trimming? Somehow my filesystem is fine with 35-30% free space and running very fast.
... (1 Reply)
Discussion started by: itik
1 Replies
LEARN ABOUT CENTOS
blkmapd
blkmapd(8) System Manager's Manual blkmapd(8)
NAME
blkmapd - pNFS block layout mapping daemon
SYNOPSIS
blkmapd [-d] [-f]
DESCRIPTION
The blkmapd daemon performs device discovery and mapping for the parallel NFS (pNFS) block layout client [RFC5663].
The pNFS block layout protocol builds a complex storage hierarchy from a set of simple volumes. These simple volumes are addressed by con-
tent, using a signature on the volume to uniquely name each one. The daemon locates a volume by examining each block device in the system
for the given signature.
The topology typically consists of a hierarchy of volumes built by striping, slicing, and concatenating the simple volumes. The blkmapd
daemon uses the device-mapper driver to construct logical devices that reflect the server topology, and passes these devices to the kernel
for use by the pNFS block layout client.
OPTIONS
-d Performs device discovery only then exits.
-f Runs blkmapd in the foreground and sends output to stderr (as opposed to syslogd)
SEE ALSO
nfs(5), dmsetup(8)
RFC 5661 for the NFS version 4.1 specification.
RFC 5663 for the pNFS block layout specification.
AUTHORS
Haiying Tang <Tang_Haiying@emc.com>
Jim Rees <rees@umich.edu>
11 August 2011 blkmapd(8)