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93
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Striping data: true RAID 0 vs user program
I want to build a high performance recording device that receives streaming data from a PCIe 5.0 card and stores it into a storage array. The throughput is 10 Gbytes/s and I need to record 20 TBytes ...
0
votes
1
answer
116
views
How can I get the value of "power on time(POH)" of a sata disk with ata passthrough?
I want to get smart imformation of a sata disk attached to raid card through ata passthrough. I find that smartmontools use the funciton bool sat_device::ata_pass_through() to get my disk's smart ...
-1
votes
2
answers
750
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Difference between implementing RAID 0 and attaching multiple EBS Volumes on AWS
What is difference between implementing RAID 0 and just attaching multiple EBS Volumes on AWS EC2? Both seem to just sum the performance (?).
Any other operational differences or use case scenarios, ...
0
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0
answers
133
views
PowerShell (Device Control)
I have an older Adaptec RAID Controller card (6805/6805Q) that controls a number of RAID1 arrays. This card has no issues with a Windows system running in the older MBR mode, but for the newer UEFI ...
1
vote
0
answers
904
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How to wait for mdadm RAID array's resync process to fully complete?
I currently have a logic to wait for the resync process to finish by looking at /sys/block/mdXXX/md/raid_state to be clean and assume that the resync has finished. However, I don't think this is ...
0
votes
1
answer
177
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Write large byte arrays on RAID0 virtual disk
I have a camera that produces 20 frames per second.
I made an app in C# that grabs the frames and put them in a concurrent queue.
I have another thread that writes the frames on filesystem.
Each frame ...
3
votes
1
answer
2k
views
Improving performance of git repo with hundreds of thousands of small files
I'm trying to improve performance of a git repository that is being used almost exclusively by me to version a scientific computing project. The project's simulation software blasts teeny (less than ...
4
votes
1
answer
718
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SCSI read capacity (10) reports wrong LBA and sector size
I've been trying to test my AHCI driver for my hobby OS on bare metal. Before that, I tested my driver in QEMU with the parameters:
qemu-system-i386 -boot d -cdrom elfboot.iso -machine q35 -m 2G -hda ...
0
votes
1
answer
285
views
mdadm statechanging alertscript
I have a handmade NAS running on "Debian 10 buster" with RAID 5 in it,
root@fox-nas:~# uname -a
Linux fox-nas 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1 (2020年01月26日) x86_64 GNU/Linux
And I tried to set ...
0
votes
1
answer
581
views
How to identify the disk Optane or Raid type using Powershell?
I would like to identify the disk information whether it contain of RAID or Optane.
Is it possible to get that information with PowerShell?
I try Get-PhysiclDisk and Get-Disk, but not including that ...
1
vote
1
answer
212
views
C++ FileApi.h no caching, how do i get the disk activity to 100%
Hello and thanks for reviewing my problem.
I have a system configured with PCIe RAID0 controller x16 lines connected to 4 NVMe Intel drives 2Tb each through m.2 connector.
Using ATTO Disk Benchmark ...
1
vote
1
answer
739
views
How to run a bash script from crontab and send the output to desktop notifications
I'm trying to get the RAID status every time i boot into my system (Debian) and send the output as notification in the desktop.
This works as expected from terminal:
sudo mdadm --detail /dev/md0 | ...
2
votes
1
answer
2k
views
How to calculate RAID 5 parity for even disc count?
When I come to RAID 5 explanations I very often see pictures showing 4 discs with three data blocks and one parity block. As example calculation (on same sites, sometimes) I always see only 3 discs. ...
0
votes
1
answer
517
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Checking of dd status in ubuntu using python
I'm creating a python script to automate dd for my raid disk. After dd is complete, i would like to perform other tasks. May i know how can i verify the statues of the dd progress using python?
os....
0
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1
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2k
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Editing hex value at a particular position in disk image file using python
How do I edit hex value at a particular Sector of Disk image file (60GB) using Python?
Example:
Given 512,
File name: RAID.img
Typical File size: 60gb+
Sector: 3
Address Offset: 0000060A - 0000060F
...