Case:In a certain enterprise, the server consists of eight hard disks RAID5. The single disk capacity is 146GB. Due to the failure of the array card, the data cannot be accessed by the SQL2005 database.Introduced by a familiar person, requiring the server RAID array card to burn the irreversible data recovery. Solution:Engineers use professional equipment…
I get these symbols on the volume mixer. It seems to happen at the end of every line. This is a nearly clean install of Windows 7 x64 (only Chrome and Firefox installed). Any idea where this could be coming from? The system is using all the default fonts. It is not a localization issue,…
Enterprises are now routinely storing workloads comprised of terabytes of data, which eventually add up to petabytes of storage. Next stop? Exabytes.
We’re going to be hearing the preface “exa-” as it refers to the data storage industry a lot more as time goes on, so we might as well get used to it.
A current illustration of this point is object-based storage provider Cleversafe, which launched a new multi-rack array system Jan. 30 that can hold billions of objects inside up to 10 exabytes of capacity.
That’s a serious amount of space. While some people describe it as limitless, it isn’t—but it’s pretty close.
For those who would like to see the actual numbers that describe just 1 exabyte, here they are:
1 exabyte = 1,000 petabytes = 1,000,000 terabytes = 1,000,000,000 gigabytes = 1,000,000,000,000 megabytes = 1,000,000,000,000,000 kilobytes = 1,000,000,000,000,000,000 bytes.
Terabyte Loads Now Routine
Enterprises are now routinely storing workloads comprised of terabytes of data, which eventually add up to petabytes of storage. All those packs of petabytes also pile up as time goes on, so what’s the next level of storage needed? Right: exabytes.
Realistically, only the true high-end enterprise systems—such as those deployed by scientific researchers, online game providers, digital video studios, stock markets, government and military installations and high-end financial services companies—are using petabyte-type storage now and will be looking at exabyte-able storage in 2012 or 2013.
But Chicago-based Cleversafe is one storage provider that figures no time is better than the present for planning for the future.
In its new 10-exabyte configuration, Cleversafe uses the same object-based dispersed storage system it developed on its own six years ago; only now it has been expanded to allow for independent scaling of storage capacity through what it calls a “portable datacenter,” a collection of storage and network racks that can be easily deployed or moved.
Each portable datacenter contains 21 racks with 189 storage nodes per PD and forty-five 3TB drives per storage node. This geographically distributed model allows for rapid scale and mobility and is optimized for site failure tolerance and high availability, Cleversafe said.
The company’s own configuration includes 16 sites across the U.S. with 35 PDs per site and hundreds of simultaneous readers/writers to deliver instantaneous access to billions of objects.
Traffic Volumes Increasing at 32 Percent Rate Per Year
“Internet traffic volumes are increasing at a rate of 32 percent globally each year. It’s not unrealistic to think companies looking to mine that data would need to effectively analyze 80 exabytes of data per month by 2015,” said Russ Kennedy, Cleversafe vice president of product strategy, marketing and customer solutions.
“To any company, data is a priceless component. However, it’s only valuable if a company can effectively look across that data over time for trends or to analyze behavior and to do it cost effectively.”
Pricing and other information can be obtained on an individual basis via email or on the Cleversafe Website.
Kroll Ontrack data recovery has announced that it has developed unique, proprietary capabilities to drastically improve the quality of data recovery from SSDs in less than a quarter of the time usually required. Engineers at Kroll Ontrack had to overcome a number of obstacles associated with flash media to develop these capabilities.
Data recovery from new technology can be very time-consuming because of the need to research the algorithms used to originally store the data; however, new capabilities from Kroll Ontrack automate many of the processes involved. As a result, it ensures a significantly more efficient recovery for a fast-growing market.
Wear leveling is also a primary difficulty of data recovery from solid state media. It is a technique that balances usage evenly across all disk sectors to ensure the maximum functional life of the media because SSDs generally have a finite number of read/writes before they become unstable. If a media failure occurs, however, wear leveling creates a time-consuming process to piece the data back together.
Another hurdle for data recovery on SSDs is that individual memory chips on devices usually work in a RAID-like configuration, making data even less contiguous and more difficult to piece together in the event of a failing device malfunction or data corruption. Additionally, there are no standardized configurations across manufacturers; this means that the new SSD recovery capabilities need to be able to handle many forms of Error Checking & Control (ECC) and Correct Address Translation via Logical Block.
Ontrack Data Recovery experts conducted extensive research into SSD technology to create these new capabilities that address these issues. This resulted in an in-depth understanding of this media, which enabled the development of unique processes and procedures with the ability to improve recovery rates decreasing the average time per data recovery.
Case:Western Digital Hard Disk, WD Western Data 640G mobile hard disk, the hard disk did not bump, for a while, it was not used, the data in it needed, but the computer was not recognized and there was a click. Solution:A data recovery technician disassembled this western data 640G hard disk WD6400AAKS from the mobile…
Case:The customer’s 500G West Digital mobile hard disk folder opens the garbled code and cannot display normal data. The customer wants to restore all the data in the mobile hard disk. Solution:According to the engineer’s analysis, the folder opens the garbled code and cannot display the normal data. This failure is the offset of the…
HDD Printed circuit board (PCB) with board number BF41-00087A is usually used on these Samsung hard disk drives: SP0822N, SP0822N, FW WA100-34, P/V FS, Samsung 80GB IDE 3.5 Hard Drive The BF41-00087A Samsung PCB repair process can usually be divided into 2 steps: find a replacement PCB and firmware transfer. BF41-00087A Samsung PCB: Board Number…
Case:A client sent a Huawei mobile phone, and this customer was also very talkative. To our customer service staff, he could not recover if he found a lot of mobile phones. Later, he knew with a friend.When you repair your mobile phone, you should go to the company that restore mobile data. His friends have…
The Causes & Solutions of Two Main types of Noise which is occurred in WD HDDs (Especially Related To L-shape PCBs).Continuous Noise & Clicking Noise
1- The Continuous Noise
Sometimes there is a continuous noise come from WD HDDs mainly with L-shape PCBs
with motor ICs (Smooth 1.3) , (L6278 1.7) & (L6278 1.2).
the noise is like : Trrrrrrrrrrrrrr or Trrrr….Trrrr…Trrrrr
so all we have to do for fixing this problem is:
1- clean the connection points which connect the head stack pins with the PCB using a pencil Rubber …carefully.
2- clean the motor IC pins thoroughly using a solvent & Toothbrush then wipe it with a piece of smooth handkerchief to remove the dust & dirt from it.
-Note- the two steps mentioned above solve the problem in few cases.
3- If the two steps mentioned above didn’t fix the problem , you have to replace the motor IC cause it’s damaged.
2-The Clicking Noise
when u power on the hard drive u will hear a noise like (click,click….click,click…click,click)
this noise may be related to the head stack or PCB, the first thing you have to do is to check the PCB By The following steps:
1- first u have to clean the Whole PCB With a Solvent & Toothbrush then wipe it with a piece of smooth handkerchief to remove the dust & dirt from it.
Caution: Cleaning of the PCB must be done carefully to avoid removal of any small electronic components.
2- Check the Resistor (R120) , [ the right value of this Resistor is (0.12 Ohm) ] ,you may adjust your multimeter to Resistor Measuring Mode to Determine its Value ,if it’s Damaged u have to replace it. but before that, u have to check Transistor Q3 , it’s a 6 pins transistor , for measuring this transistor u may adjust your multimeter to Diode Mode,[ the right Value will be: (first two pins = 0.000 , second two pins =0.000 , Third two pins = nearly over 600)]
if Q3 is Damaged it will burn ur R120 after u replace it , so be sure that Q3 is ok before replacing R120 & u may also Check Transistor Q6 by the previous method to be completely sure it’s safe to replace R120.
Note: ( to be sure of The right values of these electronic components u may compare the values u have measured with the values of a working PCB’s Components)
3- Check The Coils (such as L2 & L7) – adjust your multimeter to diode mode then the right value must be ( 0.000 ) for any coil as u all know.
4- Inspect the whole PCB for any removed component ( such as small capacitors or Resistors ) … the removal of these small components may occurred while forced cleaning of the PCB …. so be careful while cleaning it.
5- In rare cases the firmware microchip may be damaged.
——————————————————————————————
-Note- in case of Motor ICs (L6278 1.7) & (L6278 1.2) first try to desolder them then resolder them again before u decide to replace them with a new ones … this sometimes work , but if it didn’t work … replace them directly.
– in case of Motor IC (Smooth 1.3) you must replace it directly.
The image below shows you where to clean.
Have you ever heared a clicking noise from your hard drive? Do you want to know how to diagnose and recover your hard drive from this noise? Recently i found a professional recovery company (DataCent.com) which is good at recoverying data from thses hard drive clicks such as bellows:
Western Digital
1. Western Digital desktop drive with bad heads clunking.
2. Western Digital 500GB desktop drive with bad heads slowly clicks a few times and spins down.
3. Western Digital 250GB desktop drive with head crash clicks a few times, then spins down.
4. Western Digital 250GB desktop drive with stuck spindle can’t spin up, chatters.
5. Western Digital laptop drive with bad heads making clicking sound.
6. Western Digital 200GB desktop drive with bad preamplifier chip (located on the headstack) clicks a few times, spins down.
7. Western Digital desktop drive with unstable heads clicks a few times and stops spinning.
8. Western Digital laptop hard drive with stuck spindle trying to spin up with siren.
9. Western Digital 500GB desktop hard drive with bad bearings can’t gain full rotational spee
Seagate
1. Seagate desktop drive with degrading heads making thrashing, then clicking sound.
2. Seagate desktop drive with bad heads slowly clicks and beeps on spin up.
3. Seagate laptop drive with bad heads making clicking/knocking sound.
4. Seagate desktop drive with seized spindle trying to spin up.
5. Seagate Momentus laptop drive with bad heads making nasty drilling noise.
Maxtor
1. Maxtor desktop drive with bad heads making clicking/knocking/beeping noise.
2. Maxtor drive with bad heads making steady clicking/knocking sound.
3. Maxtor desktop drive with stuck spindle playing futuristic cell phone melody.
4. Maxtor drive with stuck spindle and musical siren again.
Samsung
1. Samsung 80GB desktop hard drive with bad heads making fast clicking sound.
2. Samsung desktop hard drive with bad heads clicks, then spins down.
3. Samsung 40GB desktop hard drive with bad head knocks a few times.
4. Samsung desktop drive with degrading media making scratching sound when hitting bad sectors.
Hitachi/IBM
1. Hitachi laptop drive with bad heads clicks once on spin up, then beeps.
2. IBM desktop drive with degrading media making scratching sound when hitting area with bad sectors.
3. Hitachi/IBM laptop drive with bad heads making clicking sound.
4. IBM 40GB desktop hard drive with degrading media/heads rattles and squeals on spin up.
5. Hitachi 60GB laptop drive with stuck spindle can’t spin up, makes humming/buzzing noise.
Toshiba
1. Toshiba laptop hard drive with stuck spindle trying to spin up(heard if taken close to your ear).
2. Toshiba laptop drive with degrading bearings making grinding sound.
3. Toshiba laptop drive with bad bearings making loud grinding sound.
4. Toshiba laptop drive with bad bearings making nasty drilling/screaming sound.
5. Toshiba laptop drive with bad heads making clicking/sweeping sound on boot up.
Fujitsu
1. Fujitsu laptop drive with bad heads making clicking/knocking noise.
2. Fujitsu laptop hard drive with bad heads making sweeping sound.
3. Fujitsu 40gb desktop drive with bad media making scratching noise.
Quantum
1. Quantum desktop drive with bad heads making clunking sound.
