zfs ssd

No solid-state drive, fast CPU, and then a powerful graphics card, are useless, because of the "barrel principle", the bottleneck is here ah. Today's SSD prices have fallen a lot, I remember last year I bought a 120G SSD is nearly 600 yuan, and now only need less than 400. The way I introduced the SSD and transfer system is simple (and very safe), but still need

One problem for users who want to equip their old Mac with a third-party SSD (SSD) is that the OS X system does not turn on TRIM support for Third-party SSDs. TRIM is a system-level command that allows the operating system to communicate with solid-state drives to determine which of the SSD is pleasing and not used, and is ready for erasure and replication. If th

http://blog.csdn.net/killmice/article/details/42745937 The test tool FIO is read sequentially as an example, with the following commands: fio-name IOPS-RW = Read-bs = 4k-runtime = 60-iodepth 32-filename/dev/sda6-ioengin E Libaio-direct = 1 where rw = read for random reads, BS = 4k for each read 4k, filename specifies the corresponding partition, here I am/dev/sda6, direct = 1 means the cache through Linux Test SATA Hard Drive, SAS hard drive, SSD har

Recently has been engaged in the object detection play, before using the FASTER-RCNN, the accuracy of 73.2%, the effect is good, but the recognition speed is a bit short, I use the GPU is gtx980ti, recognition speed is about 15fps. Recently discovered SSD ( Single shot Multibox detector) This paper has a good effect and speed, I have experimented with it, the speed is indeed much faster than FASTER-RCNN. The following is a two-part introduction. The f

MyISAM tables [1000000]--mysql-create-options=string additional options passed to create TABLE [] Sysbench test on SSD first:The MY.CNF configuration is as follows:[Client]Port= 3306Socket=/ssd/mysql5.5/mysql.sock[mysqld]Port= 3306Socket=/ssd/mysql5.5/mysql.sockdatadir=/ssd/mysql5.5/databack_log= 50Character-set-files

In fact, the frozen phenomenon of solid-state hard disk is not concentrated on the SSD, but the whole problem related to the hard disk, many users think that the crash itself is the problem of solid-state hard disk, we in today's article also together to analyze what is the problem of the system crash. SSD freezes cotton How to do solid state hard disk use detailed Let's take a look at the crash prob

Prerequisite: Prepare the U disk, do a good start disk (Chinese cabbage, u start, old peaches, etc.), win7ghost system files, computer.One: BIOS, SATA settings in Advanced settings: Ahci\ide: set to AHCI; 注：AHCI需要高级内核，如果进入PE，不能读取到SSD，则设置成IDE模式，并开启Legacy；Second: Enter Pe,diskgenius formatted disk; format after partition; 注：分区要至少分成两个区，一般情况，是分为一个主分区，一个扩展分区，扩展分区分成一个或多个盘符。Three: Modify the disk mode: Select the C drive (that is, to install the system

Problem Description:You have an SSD on hand and want to LLF (Low level Format). But the LLF tool displays: Media is write protected.Solution:1. Enter DiskPart as an administrator at the command prompt.2. Find this SSD3. View its property information4. Clear Properties5. Exit Diskpart C:\users\jimshu>diskpartMicrosoft DiskPart version 6.1.7601Copyright (C) 1999-2008 Microsoft Corporation.On computer:d305872Diskpart> list DiskDisk # # # Sta

The main selling points of vultr are: SSD hard drive, ultra-low price, 13 data centers around the world, 10 Gb server bandwidth, 3 GHz CPU, and excellent performance. For detailed evaluation of vultr VPs, refer to this article. The following is the test IP address officially provided by vutlr VPS: 173.199.82.214 (Japan) 108.61.234.91 (LA) 108.61.233.46 (Seattle) 108.61.238.74 (Chicago) 66.55.149.246 (New York) 108.61.239.230 (Dallas) 108.61.236.20

Article title: Ubuntu + SSD5 seconds to start. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. We know that Ubuntu 9.10 has made improvements in startup, hoping to shorten the startup time to 10 seconds. in the SSD state, the problem may be solved in 5 seconds. The Canonical developer Jorge Castro demonstrated th

-state drive is very curious, and then went back to study, and then found a method, said to be able to optimize the solid-state drive, better use of space, this study, did not think of the SSD accidentally to format, the most depressing is that I also installed in a number of working documents, What can I do about it?Fortunately, there are many existing online solutions, not a few minutes to find this top-notch data recovery software , very real softw

pre-conditions:1. InstallationLSI's megacli package Megacli642. query tool for installing SCSI devices LSSCSI Apt-get Install LSSCSIsteps:1. Find the drive letter according to OsdidCeph-disk List |Grep-a 1-b 1 osd.0 | Egrep "^/dev/sd*\b" |cut-d ': '-f1 2. Find the device based on the drive letterTarget IDLsscsi | grep/dev/sdd | awk ' {print $} ' | cut-d ': '-f33. Determine if the disk is a SAS disk perform the following command to return 2./megacli-ldpdinfo-aall | Grep-a "Target id:3" |egrep ' (

Make preparations What should I do if the system runs fast? Group raid? SSD solid state drive? No, these are all tricks. The method to be introduced today is almost ready for Windows XP to be started in an instant.ProgramLike Fei -- that is to put Windows XP into memory!What should I do if the system runs fast? Group raid? SSD solid state drive? No, these are all tricks. The method to be introduced today

Reference: http://blog.csdn.net/tianlesoftware/article/details/6009110The main types of hard disk interfaces currently available are IDE, SATA, SCSI, SAS, FC, and so on.The IDE is commonly known as the port, SATA is commonly known as the serial port, both of the hard disk is the PC and low-end server common hard disk.SCSI is the abbreviation for "Small computer system dedicated interface", which is the hard disk with this interface.SAS is the SCSI interface of the serial port. The general server

that the accuracy rate of YOLO in detecting small targets is about 8~10% than R-CNN, and the accuracy rate is higher than r-cnn in the detection of large targets. The accuracy of Fast-r-cnn+yolo is the highest, and the accuracy rate is 2.3% higher than that of FAST-R-CNN.5.4 SummaryYolo is a convolutional neural network that supports end-to-end training and testing, and can detect and recognize multiple targets in images under the premise of guaranteeing certain accuracy.6.

MethodMethod 1: By viewing/sys/block/sda/queue/rotationalWith Cat/sys/block/sda/queue/rotational, the return value of 0 is SSD, and 1 is HDD.Method 2: View by LSSCSILsscsi-list SCSI devices (or hosts) and their attributesInstanceHDD[[email protected] thatsit]# cat/sys/block/sda/queue/rotational1[[email protected] thatsit]# lsscsi[0:0:32:0] Enclosu DP bp12g+ 1.00-[0:2:0:0] Disk DELL PERC H310 2.12/dev/sda[[email protected] thatsit]#Ssds[[email protecte

Design division, Knut Grimsrud said the SATA3.0 transmission rate was 6Gbps. Now seven years later, the speed of solid-state hard disk has changed dramatically, many excellent SSD read and write speed has reached 550mb/s, this is already the limit speed of SATA3 interface, so many manufacturers choose to develop new interface solid-state hard disk. u.2 The U.2 interface, formerly called SFF-8639, is driven by Intel single-handedly. Ess

Tags: style blog http os using Java AR strong fileNext topic: Configuring and Deploying SSD Cloud Hosting-linode to build a Java environment 8. Installation and configuration of MySQL databaseInstallation Check if Yum has MySQL inside. yum list|grep mysql I'm using a 64-bit system, so here's x86_64 the suffix installed; yum -y install mysql-community-client.x86_64 yum -y install mysql-community-devel.x86_64 Cilent installation of the time has been

Make preparations What should I do if the system runs fast? Group raid? Ssd solid state drive? No, these are all tricks. The method to be introduced today is almost ready for windows xp to be started in an instant. Opening the program is like flying-it is to load windows xp into the memory! First, you have to have enough memory to accommodate Windows XP, and now the memory is not expensive, 2 GB is enough. I directly used 4 GB, 32-bit system can use m

SAD (sum of Absolute difference) =sae (sum of Absolute error) is absolute error andSATD (sum of Absolute transformed difference) i.e. Hadamard transform and then absolute sumSSD (sum of squared difference) =sse (sum of squared error) is the sum of squares of the differenceMAD (Mean Absolute difference) =MAE(Mean Absolute Error) mean absolute differenceMSD (Mean squared difference) =MSE(Mean squared error) i.e. mean squared errorWhat is Sad,sae,satd,ssd