Category: Network & Server (網絡及服務器)


By admin, December 10, 2015 22:25

竟然發現了Equallogic的蹤跡,當然已經是很舊很舊的型號了。 但是如果沒了Firmware,就等同一塊廢鐵般Useless。




Windows Server 2012 R12 and Windows 10 on ESX 4.1!

By admin, October 31, 2015 22:22

Well, you didn’t mis-read the above! Yes, I finally managed to get both (W2K12R2 & Win10) running under the old daddy VMWare ESX 4.1 with the latest VMTools installed, not supported? Huh? You must be kidding me.


1. Basically, in order to run your OEM copy of Windows Server 2012 R2, you will need to select Windows Server 2008 R2 as the OS template. Also you need the latest SLIC 2.3 ROM, the correct Dell Cert and of course a valid OEM Key.

2. De-select the default video driver (ie, WDDM) when installing VMware Tools or you will get a black screen immediately. At least this is true on Windows 10, but somehow no problem with W2K12R2. Details please refer to this blog article. (Update: actually you don’t need to install VMware Tools here)

3. Still, you will find the mouse isn’t working smoothly in W2K12R2 and Win10, this happens to both Windows Server 2012 and Windows 8 as well, and the solution is simple, download and install the latest VMWare Tools which comes with the updated drivers for video (VMware SVGA 3D), disk controller (PVSCSI) and network cards (VMnet3).


4. Again, after you have successful upgraded your VMWare Tools, then you will need to create a 1MB hard disk and select the SCSI to 1:0 and change the secondary controller type to Paravirtual, restart the VM, shut it down, change the primary hard disk controller to Paravirtual as well, finally remove the 2nd disk and controller. Viola, there is your lightening fast PVSCSI disk!

5. The other things I discover W2K12R2 and WIN10 keeps crashing for every 3-5 hours without any reason, then I found this KB which solved the problem, and make sure you applied all the windows updates.

6. Another tips is to turn off the Sleep Mode under Power Option in Windows 10, or you will face VM constantly went to sleep and hence VMTools status always shows “Not Running”.

7. Finally I discover you can install the latest Linux CentOS 7.x and Ubuntu 15.x without any problem on ESX 4.1 although it’s not listed as supported OS…strange, but working perfectly fine which leads me to think we can in fact install any updated OS on the much older ESX 4.1. One hint is to download the latest VMTools and install it! (Actually you don’t need as somehow CentOS 7-1611 comes with VMTools automatically somehow)

8. I also noticed those Linux VMware Tools status shows as “Unmanaged”!  That’s actually ok, as the tools is installed from the latest package instead of using the default attached CD-ROM (which the version doesn’t work anyway), so you can safely ignore it.

So who said these two latest OS from Microsoft aren’t supported on ESX4.1? Think again. :)

Update: May 15, 2017

Tested the latest CentOS 7-1611 also worked perfectly on ESX4.1.

Update: Oct 10, 2017

Problem found W2K12 constantly hangs, finally identified it’s the old anti-virus program Symantec Endpoint Protection that’s causing the conflicts, you will need the version at least v14.0.2415 in order for the OS to be stable.

Update: Dec 25, 2017

It turns out Windows Server 2016 follows exactly the above step and I can confirm W2K16 is running happily on ESX 4.1 without any problem! Except you need to have SLIC 2.4 BIOS!

Dell purchase of EMC should set off alarms

By admin, October 13, 2015 13:56



Dell Inc. founder and Chief Executive Michael Dell, right, and EMC Corp. CEO Joseph Tucci shake hands in an image provided by Dell after the merger of the two tech companies was announced Monday morning.

Dell Inc. is making its biggest move ever to expand beyond its personal-computing roots and compete directly with Hewlett-Packard Co.’s corporate business, buying EMC Corp. EMC, +1.76% But there are worrisome aspects to the largest tech deal in history.

One is the hefty debt load privately-held Dell is taking on in order to do the deal. The company expects to pay for the deal with cash on hand, a debt issuance and through the creation of a stock that will track Dell’s ownership interest in EMC’s virtualization software business, VMware Inc. VMW, EMC shareholders will receive $24.05 per share in cash and approximately $9.10 per share in the newly created VMware tracking stock, which didn’t seem to please VMware investors: While EMC’s stock ticked up slightly on the news, which was first reported last week, shares of VMware fell 8% Monday.

Dell hopes to pay down some of the debt through cost-cutting and the elimination of duplications and redundancies in the company. Michael Dell, the CEO of the company he founded in his college dorm in 1984, assured investors Monday the company was not taking on more than it could handle, even amid a threat of potential rising interest rates.

“I think what you’re going to see is in the first 18 months to 24 months, a significant de-leveraging coming from some cost synergies,” Dell told reporters on a conference call. ‘We have revenue synergies that are three times larger.”

Executives, though, declined to be more specific about what areas could see cuts or restructuring, preferring to focus on the more amorphous “revenue synergies,” which they told analysts were about $1 billion.

Analysts were not too keen on the idea that the companies would be looking to issue debt in an environment of rising interest rates.

“We still believe raising $33 billion plus in debt at reasonable interest rates will be challenging (but not impossible) for Dell,” Jeffries & Co. analyst James Kisner said .

Sanford Bernstein analyst Toni Sacconaghi said in a note on Monday that he believes Dell will have to raise about $45 billion in debt to finance the deal and that he was “a bit surprised that Dell was able to get financing,” according to the Wall Street Journal.

Meg Whitman, the chief executive of Hewlett-Packard HPQ, +0.00%  believes Dell is going to face an ominous task raising that much debt, and she hopes H-P can take advantage of the confusion among customers as the companies embark on this massive deal.

“To pay back the interest on the $50 billion of debt that the new combined company will have on their balance sheet, Dell will need to pay roughly $2.5 billion a year in interest alone,” Whitman said in a company-wide email to employees obtained by MarketWatch. “That’s $2.5 billion that they will allocate away from R&D and other business critical activities, which will keep them from better serving their customer.

While Whitman’s comments can be seen as self-serving, H-P has its own experience with big mergers that sucked up its cash, notably the $11 billion deal for software company Autonomy, most of which it later wrote off. H-P also wrote down a huge chunk of its $14 billion acquisition of EDS, a computer services company, both moves that H-P did in a similar push for enterprise-focused businesses.

Whitman, whose tenure at H-P started with a mandate to strengthen the company’s then-weakened cash balance, contended that the company is “two years ahead of the game,” as it prepares for its own separation of its corporate server business from its printer and PC business at the end of this month.

“We’re organized, we have a strong balance sheet and our innovation engine is humming,” Whitman wrote. “So, get out in front of your customers and your partners. Tell them our story. Take advantage of this moment.”

In addition to the hefty debt load Dell is going to be saddled with, the company is going to have to again publicly report its financial results, as a result of its new tracking stock. EMC Chief Financial Officer Zane Rowe told analysts on a conference call that along with the tracking stock, “we would expect Dell to report financials.”

“We’ll become an SEC registrant and will report financials on their business as well as the VMware business,” Rowe said.

So in addition to adding on a pile of debt, Dell — which seemingly enjoyed being out of the public limelight as a private company — is now going to be foisted into the public glare again. At least investors will be able to track its progress in this mega-merger, but it’s unlikely to be an easy road.

(Market Watch)

Disable Windows 7 Startup Repair as Default Option

By admin, September 3, 2015 16:20

This really came handy and got rid of that annoying useless repair mode after a power outage.

at CMD, type:

bcdedit /set {default} recoveryenabled No
bcdedit /set {default} bootstatuspolicy ignoreallfailures

Cleaing up Those Huge MSSQL Log Files

By admin, August 17, 2015 12:21

Today, one of my clients has complained his server is running out of space abnormally, using WinDirStat, I was able to identify the cause of the problem.

It was the MSSQL log files occupied over 20GB of space. The clean up process is pretty straight forward, manually run “EXEC sp_cycle_errorlog” 6 times or more depending how many log copies you kept, the command erased all those gigantic log files and freed up the space as you wished for, simple as that.

There is always something new for me to learn everyday, which is a good thing! :)

Note: Struggled a bit trouble when login back to Mirosoft SQL Server Management Studio, as the correct format for Server Name is /your_server_name/SQLEXPRESS.

IIS HTTP Stopped Taking Request and Connections_refused

By admin, July 11, 2015 11:40

Recently, one of the web server suddenly stopped from taking any request, restarted IIS WWW service won’t help, and there is no W3WP.exe in the process at all! Everything else seems normal, of course restarting the whole server helps, but it will happen again in a few months, so this is not the permanent solution.

Then I found out there are tons of “Connections_refused” entries are logged in the Httperr.log, it turns out the server has run out of non-pool memories.

Work around for this issue is to add the EnableAggressiveMemoryUsage registry entry to the following registry subkey:


Then, set the EnableAggressiveMemoryUsage registry entry to 1.

To do this, follow these steps:

  1. Click Start, click Run, type regedit in the Open box, and then click OK.
  2. Click the following registry subkey:
  3. On the Edit menu, point to New, and then click DWORD Value.
  4. Type EnableAggressiveMemoryUsage, and then press ENTER.
  5. On the Edit menu, click Modify.
  6. In the Value data box, type 1, and then click OK.
  7. On the File menu, click Exit to exit Registry Editor.
  8. Restart the HTTP service. To do this, follow these steps:
    1. Click Start, click Run, type cmd in the Open box, and then click OK.
    2. At the command prompt, type net stop http /y, and then press ENTER.
    3. At the command prompt, type iisreset /restart, and then press ENTER.

By default, the HTTP service in IIS 6.0 stops accepting connections when nonpaged pool memory reaches 20 MB. When you enable the EnableAggressiveMemoryUsage registry entry, the HTTP service stops accepting connections when nonpaged pool memory reaches 8 MB.

Finally A New Breed of Entry SAN from Dell !

By admin, May 8, 2015 13:50


After reading several SCv2000 reviews, I found it’s simply an upgraded version of PowerVault, so I seriously doubt the performance is even near Equallogic PS4100 series.

Quote from StorageReview:

The Dell Storage SCv2000 Series is a customer-inspired series of entry-level storage arrays that offer same common management and several of the core features as higher-end Dell SC Series arrays, such as the SC4020. According to Dell, the SCv2000 Series offers the “best performance and protection in its class with integrated data protection to support specialized projects, database and test environments, or simple storage consolidation.” The new arrays enable customers to standardize on a common platform, saving time and money. The SCv2000 Series comes in three models with expansion options: the SCv2000, SCv2020, and SCv2080

Benefits include:

  • High performance at an affordable price – The arrays deliver best-in-class performance in a single, affordable 2U enclosure. Feature-rich options include proven data protection features, RAID tiering to optimize capacity, thin provisioning, flash support, data-migration services, and multi-protocol connectivity. Granular data protection allows up to 2,000 snapshots and 500 replications.
  • Integrated data protection- Remote Instant Replay, Local Instant Replays and Replay Manager along with RAID tiering that optimizes SAN capacity. Tight integration with common application environments, such as Microsoft and VMware, help to simplify virtualized data centers, allowing local and remote data protection features to take consistent snapshots of virtual machines without sacrificing performance.
  • Future flexibility with Storage Center – Customers can gain more value from existing investments with data migration to higher-tier Dell Storage SC4000 and SC8000 Series arrays. The SCv2000 Series supports today’s needs and future growth as the arrays can be managed with the same, single user interface as other SC Series arrays. Customers can scale capacity when needed with the benefit of no capacity licensing and choose from a broad range of hard drives and SSDs, configured for a variety of applications.

SCv2000 Series specifications:

  • Models: SCv2000 | SCv2020 | SCv2080
  • Internal Storage: 12 x 3.5” drive bays | 24 x 2.5” drive bays | 84 x 2.5” or 3.5” drive bays
  • Supported expansion enclosures:
    • SC100: 12 x 3.5” or 2.5” drive bays | SC120: 24 x 2.5” drive bays | SC180: 84 x 2.5” or 3.5” drive bays
    • SC100: 12 x 3.5” or 2.5” drive bays | SC120: 24 x 2.5” drive bays
  • Maximum drive count:
    • 168 (12 internal, plus 156 external) |168 (24 internal, plus 144 external) | 168 (84 internal, plus 84 external)
  • Total storage capacity: 504TB
  • Supported drive types:
    • HDD: 7.2K RPM | 15K, 10K, 7.2K RPM | 10K, 7.2K RPM
    • SSD: write-intensive, read- intensive (different drive types, transfer rates and rotational speeds can be mixed in the same system)
  • Controllers: Single or dual controllers | Single or dual controllers | Dual controllers
  • Processor: Intel Xeon 4-core
  • Memory: 8GB per controller
  • Network/server connectivity (front-end):
    • 2 x 16Gb FC ports per controller
    • 4 x 8Gb FC ports per controller
    • 4 x 1Gb iSCSI (BASE-T) ports per controller
    • 2 x 10Gb iSCSI (BASE-T) ports per controller
    • 4 x 12Gb SAS ports per controller
  • Internal drive connectivity (back-end): 6Gb SAS ports (2 per controller)
  • Product OS: Storage Center 6.6.2
  • Server OS:
    • Microsoft Windows Server
    • SLES
    • VMware
    • Citrix XenServer
    • Red Hat
  • RAID: Supports RAID 5, 6, RAID 10 and RAID 10 DM (dual mirror)

Third Equallogic Disk Failure

By admin, April 30, 2015 11:38

This is the 3rd time a 15K SAS failed, not bad actually giving the long time period of 4 years and 6 months (The first was in December 12, 2012 and 2nd was in Jan 11, 2014), and this time the reconstruction took approximately 4 hours to complete.


First Encounter of HA Failover

By admin, April 29, 2015 17:12

Found one of the hosts performed HA Failover on its own at midnight today and all its associated VMs were restarted on the other hosts automatically. The exact cause of host restart is still under investigation as there is no hardware failure found at all.

12:17 Host is Not responding to vCenter Ping, so it triggered HA Failover. In fact, vCenter took about 50 seconds to realize the actual host failure.

12:24 It took 7 Minutes for the host to re-join vCenter cluster. In fact the host & ESX restart only took about 5 minutes counting from the boot screen.

12:28 Everything went back to green, the whole process took about 10 minutes. For individual VM, there was 5-6 minutes of downtime unfortunately.

Cluster Level Event Log


Host Level Event Log


有意思! 再用Power,你就Low了 (轉文)

By admin, April 28, 2015 10:23

要说这位嘉宾的来头可不小,他是VMware大中华区高级业务拓展经理, 新一代关键业务云平台解决方案总监王俊标。来自VMware的资料显示——在加入VMware之前,他曾在中国银行,IBM 中国工作。是IBM灾备红皮书作者之一(1999年,美国奥斯汀)。拥有丰富的IT整体架构,数据中心规划经验,熟悉金融,电信,政府等行业。



在1998年的一天,IBM有个项目经理说,目前Intel的计算性能足够好,很多CPU的时间空着,我们看看能不能把空余的时间用起来。他就创建了个项目,就请了伯克利大学一个教授叫做Mendel Rosenblum带着两个研究生,开始研究在大机上的虚机技术能不能够在Intel这样当时所谓低端的服务器上创建虚机。教授和研究生非常了不起把这个项目做出来了,虚拟花费半个小时启动了,项目经理验收通过了。沃森,很好的项目,付钱,抽屉里一放。然后就没然后了。

这个教授很郁闷,回去跟他太太讲,他太太叫Diane Greene。Diane Greene和一个中国人叫做Edward Wang正在找项目做。“我们就把这个项目做起来吧”,在1998年他们在一个有缝隙的房子里创建了VMware公司。






说虚拟化和性能下降太厉害,这件事情反复讲,再三讲,这件事情是怎么理解,性能会损耗,但是物理x86和虚拟x86会损耗6%左右。现在拿先进的、快的、便宜的至强的x86芯片跟老的贵的POWER5、POWER6去比,每次比都不好意思,每次随便你跑Oracle DB2,都比你块5倍、10倍、100倍,你老说性能差,差在哪里,怎么差?这是一个误区。



回應: VM家经理别闹了,人家POWER就是要low到底









而且,恐怕经理还得打自己的脸两下,人家POWER9还是会准时出现在大家面前——在11月18日的第44届全球超级计算机TOP 500公布时候,透露了一些关于POWER9的技术细节,说进一步强化加速器,也将是第一个可通过NVLink总线互联的处理器架构,带宽高达80-200GB/s,而且延迟和功耗都将进一步降低等等——这话可不像经理一样乱说的,人家POWER的未来已经到来,您就别瞎放炮了。







这个事情,的确是心有花则见花、心有沙则见沙的事情,我想用这几天很热的一篇文章的标题来说“国产大飞机,你敢坐吗?”不用多说吧?还有,咱们的“天河二号”在最新的全球HPC TOP 100中又夺得冠军了,貌似三连冠了,你能说中国的HPC系统比美国的HPC系统先进吗?



关于两个破词儿:Scale up和Scale out


别闹了,这都是陈年老调了,经理作为大V家的一员,不应该停留在历史中。POWER服务器早就既能纵向扩展Scale up也可能横向扩展Scale out了,既有scale up的大系统,也有scale out的小系统。随着POWER8的推出,在性能、RAS和性价比方面都大幅提升,例如4月份推出的首批5个基于POWER8的全新Power服务器,就是专门为大规模scale out计算环境设计的,一两个插槽这种事早就不是个事儿了。

今天的POWER,应用门槛儿的确是low了,例如支持Little Endian,所有的Linux应用可以直接跑在Power上;另外还支持OpenStack方案中最为广泛使用的操作系统Ubuntu,够屌丝够low。




别闹了,您能稍微严肃点吗?我的意思是说您能举个稍微靠谱的、不让圈内人说你low的例子吗?照您这说法,12306换一堆x86服务器问题就解决了?业界讨论已经很多了,12306这是scale out和scale up都很难解决的问题,Alibaba技术团队不是雄赳赳气昂昂进驻后灰溜溜铩羽而归了吗?再说了,12306后端用的明明是RISC小型机,您好歹是大VMware家的经理,肿么跟那谁谁一样把小型机叫主机啊?唉,压根儿就不是这么个角度的问题,建议经理百度一下,网上有大量深度技术剖析文章说这个事情,我懒得说了。


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