[ SOLVED ] HDD or SSD

[Wirezfree]

Hi nomko,

On the latest generation technology, it really isn't an issue.
Even back in 2014, They had tests that had already run up to 2+ Petabyte's.

In data centre's they use a lot of consumer grade SSD's,
and are running 100GB/day and they last years.

[nomko]

Benchmarking a SSD drive isn't such a good idea due the amount of read/write actions which will have it's impact on the SSD drive by means of decreasing lifespan.

[Jocklad]

Thanks Wirezfree.

Will have a look at that. 

[Wirezfree]

If you want to get a more precise timing.?
Go into synaptic and search for bootchart and select for install, it wall also install pybootchartgui.
Reboot..
Then go into filemanager to:/var/log/bootchart/
You will find a .png graphic with very detailed loading sequence like below, my desktop loads in < 8secs, the chart indicates the OS loaded in 7.05 secs.
There is supposed to be a command line to disable it, otherwise it loads on every-boot, I just un-installed it via synaptic

[Jocklad]

Out of curiosity I timed the boot.

From power on to desktop on LL 2.8........12 seconds 

[Jocklad]

Have run the new SSD now on LL 2.6 for about 5-6 hours.

Running very fast ........No problems at all.

Will mark thread as solved.

Thank you to all who helped me with this.

Jocklad 

[Wirezfree]

Yes, They are quick, I have a variety of Samsung SSD's, , 840 EVO & PRO and 850 EVO & PRO
NOTE:
There are are some issues reported with various SSD's under Linux, I posted that somewhere.??
But I have yet to experience any issues myself...

Some comments,
there was an issue when installing Windows on SSD's they did not install at the correct sector, and gave performance issues.
On Linux after many, many, many installs, I never had an issue, you can check correct install with the following, it should result in "0"

Code: [Select]


$ sudo su
[sudo] password for [user]:
blockdev --getalignoff /dev/sda1
0
blockdev --getalignoff /dev/sda2
0

To do a quick speed check..., this is my 840Pro, testing my sda drive

Code: [Select]


dave@asus-mini-1:~$ sudo hdparm -t --direct /dev/sda
/dev/sda:
Timing O_DIRECT disk reads: 1514 MB in  3.00 seconds = 504.54 MB/sec
for comparison, this is my WD Black 2.5" spinner, supposedly the fastest consumer 2.5"

Code: [Select]


dave@asus-mini-1:~$ sudo hdparm -t --direct /dev/sdb
/dev/sdb:
 Timing O_DIRECT disk reads: 324 MB in  3.01 seconds = 107.52 MB/sec


[Jocklad]

Today I got a Samsung 120g SSD and installed LL 2.6.

Boot time very fast.

Very impressed so far.

Jocklad 

[Jocklad]

Very useful.

Thanks nomko.

[nomko]

You might also consider reading this:
https://sites.google.com/site/easytipsforlinux/solid-states-drives

[TMG1961]

I recently replaced the hd in my 5,5 year old laptop with a 120GB Samsung 850 SSD and can only say that it made the laptop run like it was brand new.
Startup takes only just over 20 seconds, programs start straigt away and not after waiting for 5-10 seconds. I only have one regret..and that is that i didnt replace the hd with a ssd earlier.

[eikelein]

Will SSD work okay on older machines....?.

Jocklad,
I have installed Linux Lite on several older machines with varying SATA controllers, meaning SATA2 and SATA3; no problems at all.
I have used only quality SSDs from Samsung and/or Crucial; no problems at all.

If the original system drive was full with whatever I moved data to a classic HDD and installed the system on a low priced 100 or 120GB SSD. Tody I saw on Newegg a 120GB Samsung 850 for $69.

This makes even 8 to 10 years old boxes run like brand new champs! Okay, I see that these old boxes have 2 or 4GB of RAM, I admit.

Go for it!

[Wirezfree]

@ Austin Payne
Those figure rounded for simplicity, but very close, Gbps to MB/s
It is very confusing... bits/sec vs Bytes/sec  do some Googling Gbps to MB/s

Example
SATA 1.5Gb/s (aka SATA/150)

1,500 MHz embedded clock
x 1 bit per clock
x 80% for 8b10b encoding
/ 8 bits per byte
-----------------------------------
= 150 million Bytes per second
in other words:

150,000,000 Bytes per second
/ 1,024
----------------------------------
= 146,484.375 KiloBytes per second
=~ 146,484 KB/s

146,484.375 KiloBytes per second
/ 1,024
----------------------------------
= 143.0511474609375 MegaBytes per second

= 143 MB/s

[rokytnji]

Meh, I go SSD when ever possible

Code: [Select]

harry@harry-Latitude-XT2:~$ sudo parted -l
[sudo] password for harry:
Model: ATA D2CSTK181M11-018 (scsi)
Disk /dev/sda: 180GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  9438MB  9437MB  primary  ext4         boot
 2      9438MB  180GB   171GB   primary  ext4

FTW. It is only a touchscreen laptop. On a Desktop. I just go big and 7200 rpm.

I'm not one to overthink these things.

[Austin Payne]

Okay your conversion rates are off. 1.5G/s = 1,500M/s. Now some SSDs will be bottlenecked by sata1, but not many on the consumer side of things. Now if you start using raid or something then you might start to have some problems.

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