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Questions tagged [solid-state-drive]

SSD SUPPORT IS OFF-TOPIC. General HDD/SSD support may be asked on Super User (https://superuser.com). A solid-state drive (SSD) is a flash disk similar to a thumb drive, but much faster and with a hard-disk interface, typically SATA.

A solid-state drive is a storage medium based on high-performance flash memory. Most SSD have the same logical interfaces as hard disks (e.g. SATA ). SSDs can be distinguished from HDDs by not having any moving mechanical components.

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I use freebsd11 but iops is very very poor ('fio' tools)

I use 'fio' disk tools test speed. The disk is a intel ssd , trim and 4k alignment is enabled. Hardware is Dell R610. The disk controller is ahci and lsi 9211-8i, drive is p20, IT model, sysctl is default. Freebsd file system is ZFS or UFS, CentOS…
xinyue
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disksim + sdd extension 64 bits

I am trying to use DiskSim with the SSD model in a 64 bits environment. I found out that Microsoft has created an SSD model for DiskSim 4.0. However, I couldn't compile it as my computer is 64 bits. I saw that Western Digital released a modified…
Tamires Brito
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When using SSD, Is it better to use one thread to write 20 different files instead of 20 threads?

I have a C++ application on Linux which writes some data to an SSD. The application writes at ~100 MBytes per second. Every second, the application writes 20 new files in to the disk. Additional threads of the application perform other logic and…
user3668129
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ATA TRIM Specification?

Anyone know where I'd find an ATA reference that details the protocol for triggering a TRIM? I'm looking to discover what sort of structure/object/data I'd need to send in a raw IOCTL to get an ATA device to trigger a TRIM (assuming appropriate…
Mahmoud Al-Qudsi
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In C/C++ how to programmatically detect SATA SSD plug in and unplug in Windows?

I'm trying to write a C/C++ program to detect a new SATA SSD (solid-state drive) connection in Windows 7. This SATA SSD also comes with a SATA-USB cable. I've connected the SATA end to the SATA SDD and the USB end into my computer. Doing this I've…
user3731622
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mysqld stops right after starting because of corrupted tables (disk full + hardware reboot) - how to fix it?

I'm dumb, I did the stupidest thing I could. On one of my servers, the SSD was full and I wasn't aware of it. The high-traffic website became working really slow, then started displaying errors, because even the database couldn't save new…
Bat_
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What's MBR offset 0x1C3 and how can I edit it?

I posted this question on another website but no one was able to help me there until a user suggested I posted this question here. So... My SSD has some trouble POSTING on my old GA-P35-DS3 motherboard if I try to use the Intel controller.…
João Oliveira
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How can an Azure worker role use SSD storage?

We want to run a worker role to perform disk intensive database upgrades and scale-out instances as we have more of them to do. It would appear that we can't take advantage of the DS series virtual machines sizes for worker roles. After setting the…
Paul Davis
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SSD performance benefit in OLTP vs OLAP

In which system is SSD disk better over HDD as far as performance is concerned ? An OLTP or an OLAP system ? My guess is that in OLTP an SSD disk is more valuable, because transactions are constantly occurring and we need the non-sequential…
dimitris93
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Use SSD for SPARK RDD

I want to know how to use ssd for SPARK RDD. Originally, SPARK RDD is using in Memory. But I want to use ssd for RDD.
June Choi
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Powershell - Detect if Drive Letter is Mounted on a SSD Solid State Disk

I'm writing a Hyper-V VM build script and wanted to add a feature to select a SSD where possible to prioritise smaller and most frequently used VMs. I first found the way in from the Scripting Guys here:…
Shaun
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Best way to write logs to SSD

We have an application that does a LOT of logging. The medium we log to is SLC SSD drives however we are starting to see some failures in the field. We could turn logging off (we do), have log levels (we have) however sometimes an engineer turns on…
Sparers
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Why does reading from multiple SSDs results in lower throughput than reading from a single SSD

I'm writing an application that replicates data on three SSDs. The application then handles read requests by randomly assign each request to one of the three SSDs, so in theory all SSDs should be used equally. Note that I'm using a thread pool so…
Derek Chiang
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Risk of repeated write/delete to SSD?

I have a program in Java that creates a log file about 1K in size. If I run a test that deletes the old log, and creates a new log, then saves it, repeated a million times, if the size of the file grows over time (up to a few mb's), will I risk…
user2827214
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Do we still need to worry about row fragmentation when using flash disk storage?

Row fragmentation was always a thing you needed to think about when choosing char/varchar2 data types for table columns, issuing batch deletes/inserts/updates on the tables because Oracle tries to fit new data into opened free spaces and so…
Centurion
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