i**d
发帖数: 357 | 1 1. 要改进模块，你得先分析瓶颈在哪啊。是CPU bound的还是IO bound的。
CPU Bound的话就用profiling tool看是具体哪个地方的问题。然后看看有没有可以改
进的地方。一般来说都是可以有可以改进的。要么就是降复杂度，要么就是减少malloc
/free操作。这个得具体问题具体分析了。
IO bound的话。就看你是disk io还是网络io了。网络io的话，就看有没有办法做load
balance，把流量做得平衡一些。 disk IO的话，如果还没有到disk throughput 的
limit，可以
增加线程。如果已经到disk io throughput的limit。可以看看是否可以减少disk io，
比如将数据
缓存在内存里，将random写变成sequential的写操作。
2. 很简单，能够发现问题的log就是好的log。server比较容易出现的问题: cpu
thread耗尽。 磁盘满，读写失败。network 的问题。cpu 空闲 0. |
|
l******h
发帖数: 2 | 2 Highly reputational company with very competitive compensation for all
positions.
Please send in your resume and position/positions you like to apply to my
email address below.
h*******[email protected]
All resumes will be deliver to hiring manager directly. Act fast!
Thanks!
Silicon Engineering Group
Sr. Physical Design Timing Engineer
Timing (STA) Manager
Senior Physical Design Engineer
CAD Manager - Front-End Design and Verification
Sr. CAD Engineer - Place & Route / Physical Design Engineer
Sr. CA... 阅读全帖 |
|
k******t
发帖数: 1498 | 3 DO vs. linode的讨论最近几年比较多，板上有没有人有实际的运行经验？分享下最近两
周的经验。
鄙人的应用相对简单，接收传感器网络的数据，验证然后存储到数据库中。验证比较费
CPU，运算量大概占1/3. 数据量很小，网络不是瓶颈。大规模部署之后disk高频读写可
能会有问题。小规模的实验包括5个终端带50个传感器。数据量6KB每分钟，最高并发10
.
部署到linode的那个1Core 1G Ram的node上之后，小规模运行之后发现大概0.1%的HTTP
post request没有被成功处理。因为以前开发过程中运行在digital ocean的那个最便
宜的1core 512M ram的droplet上一直没有出过问题，这两周做trouble shooting，就顺
便比较了一下DO和linode在高并发时候的性能。
digital ocean 和linode 用的都是1 core ，1G Ram， 服务器一个在Fremont CA，另一
个在san Francisco CA，我从东湾通过comcast宽带接入。
用 Jmeter 做短时间（3～5分钟）压力测试，50 th... 阅读全帖 |
|
P*********t
发帖数: 4451 | 4 I was going to say
Second, remove any sticks from USB holes.
But this discussion was taking on a whole new life around hard disk...
It is important to leave hard disk at the end of boot order
Have floppy first. Usb second. Optical drive. Then Hard disk.
Everything that's ahead of hard disk gives you capability to take over the
machine other than just having the current OS.
Which can actually go kaput one day with your hard disk. |
|
m**x
发帖数: 245 | 5 There are several utils in the Ubuntu repositories which claim to do this --
here's the top of each one's description:
ddrescue [note, this is the package that contains `dd_rescue` command]:
" dd_rescue is a tool to help you to save data from crashed partition.
" It tries to read and if it fails, it will go on with the next sectors "
where tools like dd will fail.
gddrescue [note, this is the package that contains `ddrescue` command]:
" The gddrescue tool copies data from one file or block devic... 阅读全帖 |
|
f****n
发帖数: 355 | 6 1. Reading PC formatted zip disk on Mac is no problem.
2. Reading Mac formatted zip disk on PC is impossible.
3. You can r/w 100M disk in 250M drive, but writing 100M disk
in 250M drive is extremely slow. Yeah, I mean extremely.
4. R/W 250M disk in 100M drive is impossible.
My recommendation is to get a IDE 100M zip drive if your Mac is
a new G3 with IDE interface. If you mac use SCSI, then you have
to pay more. |
|
p*****d
发帖数: 80 | 7
应该和其它因素也有关系，比如磁盘IO的速度，取决于计算的种类。只看CPU的话，按
下面的结果同是stock频率2600k比2500k总分高36%:
http://www.cpubenchmark.net/high_end_cpus.html
我的机器上2500k超频到4.5G后跑的结果和2600大概相同(OC了31%)，但和2600k的stock
频率还是要差一些，而2600k超频后可能能达到Intel Xeon W3690的分数（按照OC 31%
计算），但后者要$1000多，所以单从追求数值计算的效率来看2600k是很超值的。当然
这里只是估算，希望thhddd和其他有2600k的版友能实测一下。
另外附上我的机器的完整测试结果，也希望能有人测量一下SSD的数据，看比raid0能快
多少。测试软件的下载页面：
http://www.passmark.com/products/pt.htm
============ 测试结果 ============
PassMark(TM) PerformanceTest 7.0 Evaluation Version http://www.pa... 阅读全帖 |
|
x****u
发帖数: 12955 | 8
simplest and cheapest is windows backup.
incremental backup is the most efficient. You only backup the files that
changed since the previous backup. But if anything happens to the base
backup, everything after it become useless.
Best solution: 1 whole disk image for the fresh installed disk. 1 whole
disk image for the last successful major change to your disk and you are
sure you don't need to go back further than that. Incremental/differential
backup for everything since that image. And t... 阅读全帖 |
|
F***Q
发帖数: 6599 | 9
here is the output from one of my servers
--------------------------------------------
Examining hard disk configuration ...
HDD Device 0: /dev/sda
HDD Model ID : WDC WD2500AAJS-75M0A0
HDD Serial No: ......
HDD Revision : 02.03E02
HDD Size : 238419 MB
Interface : S-ATA II
Temperature : 32 °C
Highest Temp.: 41 °C
Health : 100 %
Performance : 100 %
Power on time: 2379 days, 3 hours
Est. lifetime: more than 100 days
The hard disk status is PERFECT. Problematic or weak sectors wer... 阅读全帖 |
|
f**y
发帖数: 138 | 10 'dd' may not work if the two hard disks have different specifications.
'tar' may not work on those '/dev/*' files.
May be 'cpio' is what you want.
Format and mount the new hard disk. And cpio everything there. Remove the
old hard disk. Boot with a linux installation disk and choose rescue. Then
install the grub to the new disk. |
|
I*a
发帖数: 297 | 11 If you have a disk utility from hardware vendor, use it to reformat
the disk, it will check the disk and remap the bad tracks via S.M.A.R.T
If you cant find the disk utility, you can try the method listed in
"How to fix bad sectors on hard disk", though you have to have a linux box
to do this. |
|
S*A
发帖数: 7142 | 12 It depend on how it is mounted.
If it is mount as read only. Then there are no write to the disk at all.
If it is mount as read/write. Then most likely there are some
write into the disk.
If the disk is ext3/ext4 did not disable the "atime" option.
The access time stamp will be modify on reading the file.
You can use find to find it.
The first thing you should do is "dd" the whole disk image
to a back up disk to save a snapshot.
Bao zi please. |
|
D**a
发帖数: 757 | 13 我的NAS突然之间就当机了， 好像是ROM或者FIRMWARE出了问题，HDD读不出了。 NAS是
个LINUX BASED的盒子，我把硬盘去了出来， 接到了我的VM上，现在是如下情况， 请
问该如何处理？ HDD上是所有的照片和文档， 不能格式化。是下面那个1T的盘。
To run a command as administrator (user "root"), use "sudo ".
See "man sudo_root" for details.
lbblmm@lbblmm-VirtualBox:~$ xfs_repair
Usage: xfs_repair [options] device
Options:
-f The device is a file
-L Force log zeroing. Do this as a last resort.
-l logdev Specifies the device where the external log resides.
-m maxmem ... 阅读全帖 |
|
z****e
发帖数: 54598 | 14 February 22, 2015 Nicole Hemsoth
art2
If you haven’t heard of Flink until now, get ready for the deluge. As one
of a stream of Apache incubator-to-top-level projects turned commercial
effort, the data processing engine’s promise is to deliver near-real time
handling of data analytics in a much faster, more condensed, and memory-
aware way than Hadoop or its in-memory predecessor, Spark, could do.
What really captured our attention, however, was the claim by Data Artisans,
the company behind Flin... 阅读全帖 |
|
l*******G
发帖数: 1191 | 15 If both servers are windows:
Install Acronis Enterprise Server on both systems
Get a new hard disk for each of the two servers.
Have the new disk formatted to NTFS and put on netshare (网络邻居) and
make sure only admin or powerusers can use/access the share.
On computer A, mount the netshare on B, lets say \\computerB\backshare --
> drive Z on computer A.
On Computer B, mount the netshare on A, lets say \\computerA\backshare --
> drive Z on computer B.
Open Acronis Server on Compu... 阅读全帖 |
|
c**********1
发帖数: 904 | 16 BootMgr is Missing in Dell Inspiron 14 / Windows 7
This question is not answered
Posted by DCAPT
on 19 Jan 2010 4:02 AM
I have recently bought an Inspiron 14 x64 based Laptop with Windows 7 64 bit
OS (OEM) and receive this msg "BootMgr is Missing."
1. It was fine at a start, but I allot my partition badly C:drive is only
30GB and Logical drives is 182GB, so I wanted an increase of C:
2. Thru a web forum I learn about "Partition Wizard Home Edition"
downloaded it and use it to come up with a... 阅读全帖 |
|
c**********1
发帖数: 904 | 17 BootMgr is Missing in Dell Inspiron 14 / Windows 7
This question is not answered
Posted by DCAPT
on 19 Jan 2010 4:02 AM
I have recently bought an Inspiron 14 x64 based Laptop with Windows 7 64 bit
OS (OEM) and receive this msg "BootMgr is Missing."
1. It was fine at a start, but I allot my partition badly C:drive is only
30GB and Logical drives is 182GB, so I wanted an increase of C:
2. Thru a web forum I learn about "Partition Wizard Home Edition"
downloaded it and use it to come up with a... 阅读全帖 |
|
h****l
发帖数: 7290 | 18 If your two harddrive is not the same. You may damage the hard disk by ghost!
(Of course you can repair the harddisk later)
Be careful!
Three years ago I use ghost to clone from a 500Mb disk to a 1 Gb disk, It used
my 2 days to repair the later one :(
The corroct step is:
clone the old disk to a file, then clone the file to the new disk.
Am I wrong somewhere? |
|
r*****l
发帖数: 2859 | 19 随便一个data recovery软件就可以了。
final data
partition manager
", 发现disk 0是“basic”， disk 1是“dynamic”，于是把disk 1改成“basic”，
只是突然发现disk 1变成“Unallocated”. 大家看看，怎么把disk 1的数据恢复？ |
|
B*******e
发帖数: 3882 | 20 Make win2k setup bootdisk using the images in bootdisk directory of your win
2k file using the makeboot.exe in it.Use these disks to boot and run setup.
If u do not have this directory, go to
http://www.drd.dyndns.org/disks.html
and download the imagess: "Boot / Setup Disks for Microsoft Windows 2000 Pro
"
Another way is to bootup use win98 boot disk and run winnt.exe from the i386
directory. But it is said that u'd better use smartdrive to enable disk cac
he first or it is really slow. I never |
|
j***e
发帖数: 186 | 21 接到外置硬盘盒或者别的机器上看看
", 发现disk 0是“basic”， disk 1是“dynamic”，于是把disk 1改成“basic”，
只是突然发现disk 1变成“Unallocated”. 大家看看，怎么把disk 1的数据恢复？ |
|
s*****j
发帖数: 6435 | 22 你还要撑? 那就来问你一下. 下面是你的原话.
"另外一个是你问的这个n. 这个在物理学的角度可以这样理解，镜头通过介质和
盖薄片在看一个Airy disk的虚像，如果玻璃两侧的介质是一样的话，那么
这个Airy disk 的像的有效半径就应该是lambda/2n。"
1. airy disk 在哪? 像方空间还是物芳空间?
2. 什么叫Airy disk的虚像? 这个虚像成在哪? 是放大的像还是缩小的像.
3. "这个Airy disk 的像" 的半径是多大? "有效半径就应该是lambda/2n", 这个"
有效"半径有是怎么算出来的?
|
|
x***u
发帖数: 336 | 23 $#%#%....
you put a disk with radius 1/2 on each point. Then any two disks are disjoint,
due to your assumption that the distance is at least 1. If two disks are
tangent to each other, then the distance between them is exactly 1.
Then you imagine how many disks you can pack, as closely as possible, around
one disk -- you can at most 6 of them. (try it with some coins.. )
This observation along with many different variances are called packing
argument. You can find in any discrete geometry book. |
|
l**********8
发帖数: 305 | 24 为啥log总是报错，说找不到file work.cartemp
%let dataloc = /disk/agedisk1/medicare/data/20pct/car;
libname bworkhos "/disk/agebulk5/medicare.work/lbaker-DUA23466/ausmita/temp"
;
libname temp "/disk/agebulk5/medicare.work/lbaker-DUA23466/lbaker/data/xw";
ods listing file = "/disk/agebulk5/medicare.work/lbaker-DUA23466/ausmita/
temp/carrier_12212015.lst";
proc printto
log="/disk/agebulk5/medicare.work/lbaker-DUA23466/ausmita/temp/carrier_
12212015.log";
run;
*------------------------------------------------... 阅读全帖 |
|
w*******y
发帖数: 60932 | 25 Giveaway of the day
linky:
http://www.giveawayoftheday.com/easeus-partition-master-pro-601/
EASEUS Partition Master Professional Edition is an ALL-IN-ONE partition
solution and disk management utility. It allows you to extend partition,
especially for system drive, settle low disk space problem, manage disk
space easily on MBR and GUID partition table (GPT) disk under Windows 2000/
XP/ Vista/ Windows 7 (both x32 and x64).
The most popular hard disk management functions are brought together with |
|
i******y
发帖数: 119 | 26 Be reasonable and honest. OK?
http://support.microsoft.com/kb/138349
System requirements for installing Windows 95:
Personal computer with a 386DX or higher processor (486 recommended)
4 megabytes (MB) of memory (8 MB recommended)
Typical hard disk space required to upgrade to Windows 95: 35-40 MB The
actual requirement varies depending on the features you choose to install.
Typical hard disk space required to install Windows 95 on a clean system
choose to install.
One 3.5-in... 阅读全帖 |
|
b********n
发帖数: 38600 | 27 http://www.forbes.com/sites/jameslyne/2014/05/29/open-source-cr
Encryption is a silent, unsung hero of our modern connected society . From
protecting your sensitive details when you log on to Internet banking to
protecting data on your laptop or mobile phone if it is lost or stolen, ‘
crypto’ (the oft used shortened version of encryption) is a supporting
pillar of the global economy and most of the digital world we all touch day
to day. Establishing trust in crypto (and thus in technology as a w... 阅读全帖 |
|
w*******s
发帖数: 285 | 28 From user's perspective, Linux is much much faster than Windows 10 April
2018 update. I know indexer and superfetch occupy disk resource, but even
after I turn them off, disk use still hikes to 100% frequently. Even opening
a webpage takes me 10 minutes. It is incredibly hopeless.
Maybe Windows 10 works better when disk size > 20T. But keep in mind that
win 10 is
built not for IT specialist but for common users. It is not a server. So I
cannot see why MS doesn't optimize its small disk performan... 阅读全帖 |
|
d*****e
发帖数: 3868 | 29 一个windows7，开始想找茬，病人只是还比较嫩。
I recieved the software, found there was no outer seal on the wrap, (which
would prove it was unopened)and then found the inner seal (on the plastic
case was opened carefully to make it look unopened)
THEN.......I try to install.....and neither disk is readable.
Please respond quickly so we can resolve this in some way
被我坚决打击后的更新：
Update.....................
First let me say, I am not looking to have a problem, or cause a problem, so
don't worry about your EBAY status,... 阅读全帖 |
|
h***g
发帖数: 337 | 30 ☆─────────────────────────────────────☆
JOBB (Job Hunter) 于 (Thu Sep 14 12:25:19 2006) 提到:
A disk is partitioned into two hemispheres colored in black and white and
the disk is rotating. Can you put sensors (A sensor can read the disk near
it as black or white) to find the direction of the motion of the disk?
☆─────────────────────────────────────☆
wildThing (东风起兮轰他娘, 安得巨浪兮吞扶桑) 于 (Thu Sep 14 12:29:34 2006) 提到:
two sensor close together if the left one senses change in color and the
oth |
|
g*******y
发帖数: 1930 | 31 这个题目挺好的，顶上来大家讨论下。
我觉得用hash来count occurence应该是需要做的吧，有了hash file(may be
distributed across servers)之后就很简单了。
不过对于多servers的大系统如何高效的实现hash？单独的server算自己的hash，再跟
其他server通讯，merge hash file？
有个问题是，因为hash file太大，肯定是要写到disk上的文件，不可能在mem里面装下
，这样就涉及到一个disk write的问题，read时连续地址的item对应在hash表里的地址
都是不连续，而高效的disk write要求一次写入一个large chunk的data，如果你每次
只能disk write一个10Byte的数据，岂不是效率太低了？怎么解决这个问题？ |
|
s******2
发帖数: 282 | 32 不知道string排序是什么意思
假设就是10G LW 整数，给一个4G内存空间对10G数排序，也假设有个subroutine能把1G
整数在4G内存中排序
1. read 1st 1G numbers from disk
2. sort using subroutine
3. read numbers from disk， make sure the smallest 1G number in ram and
write the larger ones back in disk
4. write the smallest 1G numbers back in disk
repeat 1 ~4 for the second 1G number till the end
Notes:
You may rescale the 4G memory to 1G or any other size
string 排序 要是指有index之类的结构 （比方每个string做hash），又可以基于此方
法对index操作 |
|
s******2
发帖数: 282 | 33 我认为这道题的主要问题是对用户程序来说ram和disk都不是transparent，系统调用背
后实际上都是块操作，disk更是通过dma进行的，所以实际解决这个问题要用几个数据
结构rescaling和fine tuning每次传输的数据块的大小，才能提高效率/速度
单纯的强调操作次数是纯理论的，实际上根本不可能只对一个数在磁盘上改写，而这些
数又是随机的，所以必须首先对数据结构化，最基本的就是，划分1G内存，比如
- 读512M数进行排序
- 再每次从disk上读256M，
- 跟前面的512M数据比较，小的留下，大的存在一个临时的buffer，size 4K～256K，
这样可以一边比较一边把大的数回写到磁盘上
- 像你说的，这个可能O(n^2)，但这是cpu比较的次数，磁盘的读写要少的多，cpu比起
disk要便宜的多
我前面说的是一个大概的思路，实际实现要看具体数据内容，你有好的方法不妨说一下 |
|
a********9
发帖数: 129 | 34 google面的是SRE
电面是国人大哥，一些c语言的pointer问题，然后一道leetcode原题
onsite1:
1)combination,还是没dupliate的，要把结果保存起来，我说用linked list，因为是
用c写，还要自己implement linkedlist， 略坑爹
2) 就是很简单的统计两个string分别有多少个单独的letter
onsite2:
bst inorder iterator
onsite3:
一个文件，每行是rack_name + machine id，输出每个rack有多少个machine,按大小排
序，我是先扫一遍存hashtable，再存进linkedlist再sort，这回没让我实现hashtable
跟linkedlist了，不过要我把用过的api单独再declear一下，最后再写个mergesort
onsite4:
有很多个machine，要求检测哪些die了，要求parallel，就写了一个for loop创建若干
个thread来执行任务，有点thread pool的感觉,用一个array来表示哪个machine被检... 阅读全帖 |
|
l***i
发帖数: 1309 | 35 这么大的东西不能用一台机器装吧，10^6 G data, even use disk, it is a lot, a
peta integers, you might want to ask how this matrix is stored in disk, and
is that one disk or multiple disks. |
|
A**l
发帖数: 2650 | 36 【 以下文字转载自 Visa 讨论区 】
发信人: Aawl (宝宝蛋-湾野分舵~), 信区: Visa
标 题: 晕，160网站硬盘满了。。。
发信站: BBS 未名空间站 (Sat Sep 7 23:42:22 2013, 美东)
老丈人说有个信息错了，刚才去改，结果。。。
There is not enough space on the disk.
哎，是不是要等周一了。。。已经预约了下周三面签。。。郁闷ing。。。
Server Error in '/QotW' Application.
There is not enough space on the disk.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.
Exception ... 阅读全帖 |
|
c****e
发帖数: 502 | 37 clik drive可以当digital camera的film, compact flash and smartmedia价格昂贵
有了clik drive后,一切迎刃而解
clik drive可接收compactflash and smartmedia,然后直接转到clik disk上
把原来在cf and sm里的就可以抹去重用，
这样只要有足够的clik disk就再不用愁cf and sm的容量问题了
clik disk 7, 8块钱一张40mb,然后也不用digital camera的超慢serial和电脑相连
直接用clik drive与电脑连来download相片
clik drive和disk体积很小,携带方便
现在在mobshop有卖的，,一种是clik kit for dig cam kit, 另一种是clik plus
clik plus可以接dig cam and notebook pc, 功能比dig cam kit要多，价钱一般也比
dig cam kit贵好几十，可是mobshop现在clik plus kit starting price 才卖200 |
|
A**l
发帖数: 2650 | 38 老丈人说有个信息错了，刚才去改，结果。。。
There is not enough space on the disk.
哎，是不是要等周一了。。。已经预约了下周三面签。。。郁闷ing。。。
Server Error in '/QotW' Application.
There is not enough space on the disk.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.
Exception Details: System.IO.IOException: There is not enough space on the
disk.
Source Error:
An unhandled exception was generate... 阅读全帖 |
|
y***u
发帖数: 1467 | 39 【 以下文字转载自 Law 讨论区 】
发信人: yueru (月如), 信区: Law
标 题: 转让2006 PLI Patent Bar Home Study Package
发信站: BBS 未名空间站 (Mon Apr 30 21:40:12 2012, 美东)
所含内容:
1.Master Folder
2. Prime Question Book
3. ClaimLight Book (for better claim drafting techniques, not tested in Exam)
4. Audio CD (36 Disks)
5. DVD( 8 disks)
6. CD ( 4 Disks)
7. PatWare 9.0 ( 1 Disk) ( Data base of real test questions.)
The content covers M.P.E.P. E8R6 (or E8R7?). The exam is now testing E8R8,
which contains some changes in 2011. The main... 阅读全帖 |
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x********3
发帖数: 377 | 40 because the disk u got from china are Regional All disk.
keep in mind, they can code dvd player and they also can code disk. i don't
think everything, maybe some disk u can play, not everything u got from
china. unless u watching movie that is "taped in theater" that u can hear
other people laughing. hehehehe
i guess u don't need it then, however, if u need next time, i will charge u
20! hahahhaha |
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d******n
发帖数: 12850 | 41 【 以下文字转载自 Software 讨论区 】
发信人: dreamsun (夢陽), 信区: Software
标 题: Mac启动到一半死机怎么解决？
发信站: BBS 未名空间站 (Thu Jun 23 16:26:49 2011, 美东)
check disk的时候提示"ERROR: Disk First Aid is unable to read the startup
Disk. For help, search for Disk First Aid in Mac OS Help."，接着按done，随后
开始进入启动，可是启动到一半，Mac就死机了，死活进不去，重启了还是照样。
请教这问题如何解决？thanks。能解决了的话大包子答谢。 |
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K****n
发帖数: 756 | 42 【 以下文字转载自 Software 讨论区 】
发信人: Kenyon (甲乙丙丁), 信区: Software
标 题: 求助：用Acronis硬盘分区导致一个分区corrupt
发信站: BBS 未名空间站 (Thu Jul 22 21:49:03 2010, 美东)
用Acronis disk director suite增加了点c盘的capacity，操作系统winxp home
edition，估计挪动了一个local disk的space，然后说是那个local disk corrupt了，
不能
读，用acronis看那个disk还在，但没有free space，也不让再加了，说是到了max
capacity。
求大家支招！跪谢！ |
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w*****n
发帖数: 25 | 43 There is no much infomation in the minidump file.
1: kd> !analyze -v
****************************************************************************
***
*
*
* Bugcheck Analysis
*
*
*
****************************************************************************
***
KERNEL_DATA_INPAGE_ERROR (7a)... 阅读全帖 |
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b****i
发帖数: 11322 | 44 4/5 workout
今天的内容我都不知道怎么说了,TRAINER太有创造力了.......
1.
the cardio machines on the 2nd floor was closed, so we started the training
with sprint/stop/touchdowns.....
4 disks on the floor with some distance in between. touch 1-2-1-3-2-4-3-4-1,
for time. the number of secends will determine the reps i will to for the
next exercise.....
1st set was 22sec, 22 mountain climbers (this was easy)
2nd set was 40sec due to my mis-understanding of the instruction, 40 wall
squats holding 25lbs disk each hand :O
... 阅读全帖 |
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l******n
发帖数: 11737 | 45 http://en.wikipedia.org/wiki/Xbox_360_technical_problems
Scratched discs
Disc that has been scratched by the Xbox 360 consoleAlmost at the same time
the Xbox 360 was released in late 2005, customers began reporting rounded
scratches found on discs used in their Xbox 360 consoles. Almost two years
later, in February 2007, the website "The Llamma's Adventures" investigated
the matter and concluded that some Xbox 360 drives lack a mechanism to
secure the disc solidly in place.[38] Tilting or moving... 阅读全帖 |
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b*s
发帖数: 82482 | 46 那就把硬盘抽出来，放到另外的disk station上去呗……
这些个硬盘都是可以热插拔的，而且Disk Station本身就是一个CPU/Memory/Disk
Controller，不放心多买几个Disk Station就是了……
个人感觉synology的东西很可靠…… |
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s**********3
发帖数: 814 | 47 SAGER的， 没听过的电脑牌子， 1700刀
17.3" Full HD LED-Backlit Display with Super Glossy Surface (1920 x 1080)
Nvidia GeForce GTX 560M GPU with 1.5GB GDDR5 Video Memory
2nd Generation Intel® Core™ i7-2720QM Processor ( 6MB L3 Cache, 2
.20GHz)
IC Diamond Thermal Compound - CPU + GPU
Genuine MS Windows® 7 Home Premium 32/64-Bit Edition ( 64-Bit Preloaded
)
16GB Dual Channel DDR3 SDRAM at 1333MHz - 4 X 4GB
RAID-0 Storage ( Data Strip - Requires 2nd Hard Disk Drive with identical
capacity as Prim... 阅读全帖 |
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H********g
发帖数: 43926 | 48 可能是这些共面行星和太阳都是同一团云凝聚成的吧。
http://curious.astro.cornell.edu/question.php?number=205
Rings and disks are common in astronomy. When a cloud collapses, the
conservation of angular momentum amplifies any initial tiny spin of the
cloud. As the cloud spins faster and faster, it collapses into a disk, which
is the maximal balance between gravitational collapse and centrifugal force
created by rapid spin. The result is the coplanar planets, the thin disks
of spiral galaxies, and the accretion disks around... 阅读全帖 |
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