Then it should be pretty easy to whip up a quick routine to test the processor speed, memory bandwidth, and I/O speed (random and sequential), to see if anything looks abnormal. Or there are benchmarking programs on the web that you can use to test your system.

To be honest, nothing you've described sounds abnormal for an HDD. That's why I don't use them to run the operating system in any of my machines, and haven't done so for the greater part of a decade.

Ok thanks , I will do a tests on processor , Memory and I/O speed then I will send you a report on this forum to see If some thing is abnormal.

thank you any way

Hello, I did a benchmarking report with command sysbench and other system commands here is results:
CPU benchmark:
--with sysbench:
sysbench --test=cpu --cpu-max-prime=20000 run
sysbench 0.4.12: multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 1

Doing CPU performance benchmark

Threads started!
Done.

Maximum prime number checked in CPU test: 20000


Test execution summary:
total time: 28.3051s
total number of events: 10000
total time taken by event execution: 28.3042
per-request statistics:
min: 2.71ms
avg: 2.83ms
max: 10.74ms
approx. 95 percentile: 3.07ms

Threads fairness:
events (avg/stddev): 10000.0000/0.00
execution time (avg/stddev): 28.3042/0.00
--with lscpu | grep "MHz":
CPU MHz: 802.054

File IO Benchmark:
sysbench --test=fileio --file-total-size=2G --file-test-mode=rndrw --init-rng=on --max-time=300 --max-requests=0 run
sysbench 0.4.12: multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 1
Initializing random number generator from timer.


Extra file open flags: 0
128 files, 16Mb each
2Gb total file size
Block size 16Kb
Number of random requests for random IO: 0
Read/Write ratio for combined random IO test: 1.50
Periodic FSYNC enabled, calling fsync() each 100 requests.
Calling fsync() at the end of test, Enabled.
Using synchronous I/O mode
Doing random r/w test
Threads started!
Time limit exceeded, exiting...
Done.

Operations performed: 15044 Read, 10029 Write, 32000 Other = 57073 Total
Read 235.06Mb Written 156.7Mb Total transferred 391.77Mb (1.3059Mb/sec)
83.58 Requests/sec executed

Test execution summary:
total time: 300.0015s
total number of events: 25073
total time taken by event execution: 173.2478
per-request statistics:
min: 0.00ms
avg: 6.91ms
max: 249.88ms
approx. 95 percentile: 18.26ms

Threads fairness:
events (avg/stddev): 25073.0000/0.00
execution time (avg/stddev): 173.2478/0.00
Memory benshmark:
--with dmidecode :
# dmidecode 2.11
SMBIOS 2.7 present.

Handle 0x0012, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x0011
Error Information Handle: 0x0013
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: SODIMM
Set: None
Locator: Bottom-Slot 1(top)
Bank Locator: BANK 0
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: ELPIDA
Serial Number: 404DA11D
Asset Tag: 0123456789
Part Number: EBJ41UF8BCS0-DJ-F
Rank: Unknown
Configured Clock Speed: 1333 MHz

Handle 0x0015, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x0011
Error Information Handle: 0x0016
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: SODIMM
Set: None
Locator: Bottom-Slot 2(under)
Bank Locator: BANK 2
Type: DDR3
Type Detail: Synchronous
Speed: 1333 MHz
Manufacturer: ELPIDA
Serial Number: 4083A11D
--with pmbw :
there is a pdf created with pmbw program to benshmark memory :
plots-Pentester.pdf

thank you in advance.

CPU and memory results look fine to me, but your I/O results are abysmal. I don't know how much of that is "normal" for an HDD, because I don't have any to compare against, but the results of the same test on my work machine with an old SATA-II SSD are:

I had the very same problem with VirtualBox 5.2.20 and i downgraded the version to 5.2.6 and everithing runs ok

For some reason the latest version of virtualbox has some trouble with kali distribution.

I hope that helps.

Cheers