10 More Discussions You Might Find Interesting
1. Solaris
Good Afternoon,
I am setting up a SunBlade 2000 with Solaris 9. I have a hard drive of unknown condition installed in the bottom slot. The machine powers up to the {ok}
I'm trying to boot cdrom -sthe CDROM "Solaris 9 Operating Environment" so I can format the hard drive. I get: Error:... (13 Replies)
Discussion started by: Stellaman1977
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2. Shell Programming and Scripting
We have the data looks like below in a log file.
I want to generat files based on the string between two hash(#) symbol like below
Source:
#ext1#test1.tale2 drop
#ext1#test11.tale21 drop
#ext1#test123.tale21 drop
#ext2#test1.tale21 drop
#ext2#test12.tale21 drop
#ext3#test11.tale21 drop... (5 Replies)
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3. Solaris
Would simply like to write data (no audio) to a CD/RW disk. The disk drive states CD/RW on the front but don't know for sure if the software is configured to recognize it as a writable disk. I can read/move data from the disk to the hard drive with no issue from the disk. Any help in this... (4 Replies)
Discussion started by: jes1trish
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4. UNIX for Dummies Questions & Answers
Hi there,
I'm wondering how to display a disk label (why not edit it but I don't need that yet).
I found several commands on forums like disklabel and diskinfo but I can't find them on my system and don't know the package they belong to.
Can you help me?
Cheers
Santiago (2 Replies)
Discussion started by: chebarbudo
2 Replies
5. Filesystems, Disks and Memory
Being a novice user to linux i m little unaware of how would i check disk read write speed.
One of my mate is suggesting to create a file using dd command and check how much time it takes to create a 30 gb file .
I think this has a little sense however i would also like to take your reviews... (5 Replies)
Discussion started by: pinga123
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6. Solaris
Hi
I am using Solaris8.I want to find the total disk space of my server.Can anyone please tell that which field in below mentioned code signifies the disk space and whether this space is in Mb or GB.
c11t0d52 <EMC-SYMMETRIX-5264 cyl 4 alt 2 hd 15 sec 64>
... (4 Replies)
Discussion started by: sharmaankur85
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7. SCO
i was installing i my computer windows xp and sco
when i use knoppix5.0 live to read scsi partition wish sco was installing
show me message that i have not permission to acces in scsi hard drive
help me please (1 Reply)
Discussion started by: walidfinder
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8. UNIX for Advanced & Expert Users
I have 3 columns in an excel sheet.
c1 c2 c3
EIP_ACCOUNT SMALL_TS_01 select A.* from acc;
All the above 3 col shoud be passed a variable in the unix code.
1.How to read an excel file
2.How to pass these data as variable to the unic script (1 Reply)
Discussion started by: Anne Grace
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9. SCO
I have formatted a floppy disk under SCO unix.
Is there a way I could read this disk under another
operating system e.g. Windows or Linux? (1 Reply)
Discussion started by: sgertsos
1 Replies
10. Linux
Hello
I am trying to read from a small disk , 256 MB , removable sandisk.I am not able to access the device. The system does not recognise my disk to copy file s from the disk.
Please post your solution in this issue.
Thanks (2 Replies)
Discussion started by: singh85
2 Replies
DMC(1) DMC(1)
NAME
dmc - controls the Disk Mount Conditioner
SYNOPSIS
dmc start mount [profile-name|profile-index [-boot]]
dmc stop mount
dmc status mount [-json]
dmc show profile-name|profile-index
dmc list
dmc select mount profile-name|profile-index
dmc configure mount type access-time read-throughput write-throughput [ioqueue-depth maxreadcnt maxwritecnt segreadcnt segwritecnt]
dmc help | -h
DESCRIPTION
dmc(1) configures the Disk Mount Conditioner. The Disk Mount Conditioner is a kernel provided service that can degrade the disk I/O being
issued to specific mount points, providing the illusion that the I/O is executing on a slower device. It can also cause the conditioned
mount point to advertise itself as a different device type, e.g. the disk type of an SSD could be set to an HDD. This behavior consequently
changes various parameters such as read-ahead settings, disk I/O throttling, etc., which normally have different behavior depending on the
underlying device type.
COMMANDS
Common command parameters:
o mount - the mount point to be used in the command
o profile-name - the name of a profile as shown in dmc list
o profile-index - the index of a profile as shown in dmc list
dmc start mount [profile-name|profile-index [-boot]]
Start the Disk Mount Conditioner on the given mount point with the current settings (from dmc status) or the given profile, if pro-
vided. Optionally configure the profile to remain enabled across reboots, if -boot is supplied.
dmc stop mount
Disable the Disk Mount Conditioner on the given mount point. Also disables any settings that persist across reboot via the -boot flag
provided to dmc start, if any.
dmc status mount [-json]
Display the current settings (including on/off state), optionally as JSON
dmc show profile-name|profile-index
Display the settings of the given profile
dmc list
Display all profile names and indices
dmc select mount profile-name|profile-index
Choose a different profile for the given mount point without enabling or disabling the Disk Mount Conditioner
dmc configure mount type access-time read-throughput write-throughput [ioqueue-depth maxreadcnt maxwritecnt segreadcnt segwritecnt]
Select custom parameters for the given mount point rather than using the settings provided by a default profile.
See dmc list for example parameter settings for various disk presets.
o type - 'SSD' or 'HDD'. The type determines how various system behaviors like disk I/O throttling and read-ahead algorithms affect the
issued I/O. Additionally, choosing 'HDD' will attempt to simulate seek times, including drive spin-up from idle.
o access-time - latency in microseconds for a single I/O. For SSD types this latency is applied exactly as specified to all I/O. For HDD
types, the latency scales based on a simulated seek time (thus making the access-time the maximum latency or seek penalty).
o read-throughput - integer specifying megabytes-per-second maximum throughput for disk reads
o write-throughput - integer specifying megabytes-per-second maxmimu throughput for disk writes
o ioqueue-depth - maximum number of commands that a device can accept
o maxreadcnt - maximum byte count per read
o maxwritecnt - maximum byte count per write
o segreadcnt - maximum physically disjoint segments processed per read
o segwritecnt - maximum physically disjoint segments processed per write
dmc help | -h
Display help text
EXAMPLES
dmc start / '5400 HDD'
Turn on the Disk Mount Conditioner for the boot volume, acting like a 5400 RPM hard drive.
dmc configure /Volumes/ExtDisk SSD 100 100 50
Configure an external disk to use custom parameters to degrade performance as if it were a slow SSD with 100 microsecond latencies,
100MB/s read throughput, and 50MB/s write throughput.
IMPORTANT
The Disk Mount Conditioner is not a 'simulator'. It can only degrade (or 'condition') the I/O such that a faster disk device behaves like a
slower device, not vice-versa. For example, a 5400 RPM hard drive cannot be conditioned to act like a SSD that is capable of a higher
throughput than the theoretical limitations of the hard disk.
In addition to running dmc stop, rebooting is also a sufficient way to clear any existing settings and disable Disk Mount Conditioner on
all mount points (unless started with -boot).
SEE ALSO
nlc(1)
January 2018 DMC(1)