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Questions tagged [ssd]

Solid-state drive refers to a data storage device that uses solid-state memory to store its persistent data.

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mysql - measure amount of write

System : Centos 6.4, PerconaDb/MySQL 5.5.31 Im running relatively small mysql database with some 30 databases, total amount of 12Gb, but heavy on reads, updates and writes (texts, posts, user data and user actions are being CRUD evenly during the…
Radek
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How to erase a SSD to restore factory performance in Linux?

Due to big performance issues with an mdraid-1 array I'd like to pull down from the array one of the devices (Samsung 840 Pro), erase it to restore factory performance and re-add it to the array. The reason I want to do this to one of the SSDs is…
Andy B
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Various problems with software raid1 array built with Samsung 840 Pro SSDs

I am bringing to ServerFault a problem that is tormenting me for 6+ months. I have a CentOS 6 (64bit) server with an md software raid-1 array with 2 x Samsung 840 Pro SSDs (512GB). Problems: Serious write speed problems: root [~]# time dd…
Andy B
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connecting SATA SSDs to SAS

Is there any performance loss when connecting a SATA SSD to a SAS controller? Edit: Assume the controller doesn't have SATA connectors and I use a SATA to SAS interposer. Will there be any performance loss to either the SSD or the other drives (I…
Meidan Alon
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OK to replace 2 SAS HDs with 2 SATA II SSDs on PE2900?

Is it OK to replace 2 SAS HDs with 2 SSDs on a PE2900 with a PERC 5/i Integrated RAID controller? In both cases, the drives are configured as a RAID 1 system volume (OS and programs). In addition to the RAID 1 volume the RAID controller supports two…
sejong
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3rd party SSD drives in HP Proliant server - monitoring drive health

As discussed in a previous question, we have 6 OWC Mercury Extreme SATA SSD drives installed in our HP Proliant DL360 G7 server (using a P410i RAID controller). They work great, and are very fast. However, I'm aware that SSD drives unfortunately…
KenD
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Concerns of simultaneous failure of SSD Raid1

Since SSD's have a write limit requiring wear leveling one would assume that all things being equal 2 identical SSD drives would wear nearly identically if they mirror data writes. When one drive fails you can assume the other one is holding on by…
Tvanover
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SSD disk reports ATA errors

Yesterday I got report about SSD ATA errors on one of my hosts. SSD disk is 128MB OCZ-VERTEX4 Firmware rev 1.3 about 8 months old. OS is Ubuntu 11.04 running kernel 2.6.38-16-generic. Motherboard is Intel DP35DP. There are no read errors or any…
AlexD
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Using both expanders in HP D2700

I am considering purchasing an HP D2700 for use with SSDs (Samsung Pro 840's), for use in realtime playback of high resolution images. The D2700 has two I/O modules (which I assume are the actual SAS expanders). However, since the enclosure was…
Antoine Durr
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Zeus IOPS SSD vs Fusion-IO

Like many of you I've been following the enterprise SSD market. I'm a desktop application developer so let me apologize in advance if the answer to my question is obvious. Based on the specs it seems that Fusion IO's product is a better choice…
Rob
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SSD read errors; should I be worried?

An SSD just over a month old is producing read errors in my syslog whenever rsync backs it up: [276877.360221] ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0 [276877.360226] ata1.00: irq_stat 0x40000008 [276877.360229] ata1.00: failed…
Rena
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8kb block sizes as it relates to different storage layers

I have a PCIe SSD card that uses 8kb block cells. It supports "Virtual Controllers" that can split this drive in half and create LVM RAID0 with 8kb stripe size. On top of that I install a file system that uses 8kb block sizes. My application writes…
Mxx
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What is the likelihood of data loss in a failed SSD vs HDD?

It is well documented on Wikipedia that a head crash in a hard disk drive (HDD) may result in some data loss. However, there is not much being written about the different modes of a solid state drive (SSD) failure, and whether such failures would…
Question Overflow
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RAID10 (16 x 256GB SSDs) in PowerEdge R720 for Build Server

I'm trying to put together specs for a top of the line Dell R720 (running Windows Server 2008R2) build server (C#), and I'm unsure what the best hard drive / RAID setup would be. Our space requirements are: C (OS) - 100GBs E (SOURCE) - 600GBs F…
heyjon
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Installing Fedora 17, Error “you have not created a bootloader stage1 target device”

Installing Fedora 17 on a new computer with the live CD ISO. When I get to the part where I create new partitions for the Fedora Installation I get these errors: you have not created a bootloader stage1 target device sda must have a gpt disk…
Charity Leschinski
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