StorageTux

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StorageTux last won the day on September 3 2014

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About StorageTux

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  1. First performance comparison on Chinese forum: (original) (english)
  2. StorageTux

    Western Digital drive model numbers

    Well, there are several indicators useful to find out how many and which platters (density) are used. Primarily you can weight the drive, or even read the weight value in the drive spec sheet. Thats all you need to know to realize how many platters are in there. There is no need to disassemble the drive :-) Of course there are other additional indicators like sequential read/write characteristics, acoustics, etc.. As you may remember, I posted information about new 1TB-platter Caviar Green drives in 12/2011!!! There is no doubt Caviar Green WD10EZRX is single platter design, since it weights 0.45kg like other single platter variants and declares maximum performance 150MB/s. Same applies to WD5003AZEX. Since WD permanently lying or keeping important drive characteristics secret, you are always forced to do a little research on your own.
  3. StorageTux

    Western Digital drive model numbers

    Honestly, those revision numbers following model number are unfortunately very important. Although you can not decipher them or translate into useful information, different revision numbers often indicate you hold completely different drives. For example your WD20EARS-00S8B1 use 500GB platters (4/8) but WD20EARS-00MVWB0 use 667GB platters (3/6). This is traditional unfair practice by WD deceiving its customers mixing different hardware under same label (model number). They do not put info about number of platter / head into drive spec sheet either. Keeping this most important information secret let WD sell out older technology without noticing customer or lowering the price. See HDD platter database. http://rml527.blogspot.cz/
  4. StorageTux

    New Western Digital 1TB platter drives

    Single platter drives are usually best in case of power consumption, heat generation and risk of mechanical damage.
  5. I found new WD10EZRX Caviar Green drives on the market. Brief look into the specs revealed, these drives might utilize 1TB platters. hint: WD10EZRX weight is the same as new 750GB, 500GB and 320GB models (WD75000AZRX, WD5000AZDX and WD3200AZDX).
  6. StorageTux

    How to interpret SMART data

    the output is broken because windows cmd break the lines. Typical output look like this: SMART Attributes Data Structure revision number: 10 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 117 100 006 Pre-fail Always - 127573128 3 Spin_Up_Time 0x0003 100 100 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 12 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 100 253 030 Pre-fail Always - 893897 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 168 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 12 183 Runtime_Bad_Block 0x0032 100 100 000 Old_age Always - 0 184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Command_Timeout 0x0032 100 100 000 Old_age Always - 8590065666 189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0 190 Airflow_Temperature_Cel 0x0022 063 051 045 Old_age Always - 37 (Min/Max 32/37) 194 Temperature_Celsius 0x0022 037 049 000 Old_age Always - 37 (0 26 0 0) 195 Hardware_ECC_Recovered 0x001a 032 032 000 Old_age Always - 127573128 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 19 240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 18738942312634 241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 1421420256 242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 1806906902 As long as you have "pre-fail" or "old age", everything should be fine. Here you can find information about SMART parameters. Many of the values are vendor specific.
  7. StorageTux

    How to interpret SMART data

    At first, I would use some trustful tool to read SMART values. Definitely try Smartmontools.
  8. There are new Seagate drives utilizing 1TB platters on the web and also in this Seagate document. ST3000DM001 3.0TB 7200 3.5" Barracuda Internal Drive ST2000DM001 2.0TB 7200 3.5" Barracuda Internal Drive ST1000DM003 1.0TB 7200 3.5" Barracuda Internal Drive More detailed spec are here: source Does anybody know the release date of these drives? Some shops on the web have already added them into the price lists.
  9. Microsoft made "incompatibility", "very poor HW support", "lack of effective admin tools", "never ending reboot cycles" and poor security updates as an industry standards. So if anybody tell me Windows is easy, have better support and more understandable for ordinary people, he make me laugh.
  10. StorageTux

    Is Western Digital trustful HDD vendor today?

    I found out that WD drives do not indicate exact ATA draft specification version. Smartmontools returns this: ATA Standard is: Exact ATA specification draft version not indicated Even enterprise WD RE series do not report this information. I also realized that Seagate drives indicate more parameters in S.M.A.R.T. than WD drives. I wonder why WD permanently choose not to report or report less basic information to the customer.
  11. I really do not understand, why the HDD vendors do this. "Physical sector size" is not legacy parameter. It was added to group of drive indicators just to solve the problem we have now. Legacy OS work with "logical sector size". It usually does not know, there is another parameter (added lately) "physical sector size". That is the why it was designed such way. Modern OS still works with logical sector size, but does know the "physical sector size" parameter and it is able to read it. If the drive have 4kB sector size and reports 512B logical sector size, it is legacy compatibility reason. But I do not see any reason to cripple "physical sector size", which should not be known and readable by legacy OSes, but helps modern OSes to align partitions correctly. Yes. Aligning partitions to 1MB is clever hack, but does not solve the problem. It works around it.
  12. We are still waiting for some detailed explanation. What does it mean "firmware works completely internally"? If I start partition missaligned, let say LBA 2045, what does Smartallign do? Does it "force" drive to start partition at LBA 2048 (alligned value)? And what does report to OS then? LBA 2045 or LBA 2048? Or Does it start partition at LBA 2045 and use powerful processor to manage read/write operations so the user does not notice performance degradation of missaligned partiioning shceme? The Most important question remain unanswered. What Physical and Logical sector size new Barracudas reports. If Seagate use physical/logical sector size indicators correctly, any modern OS should recognize 4kB sector size and align partitions on its own. Then no smartalign technology would be needed. After a WD disaster with "advanced format" and their ugly implementation of 4kB sector drives violating ATA standard, It would be great to see Seagate did it right way. Opensolaris/ZFS would be no problem then.
  13. Well, there are two types of so called "Emulation". Since legacy systems support only 512 logical sector size, the ATA standard implemented aditional information of physical sector. So the 4kB sector drive reports 512B logical sectors and communicate with OS using 512B sectors, but also reports 4kB physical sector size, so modern operating systems are able to align partitions with 4kB boundary. What idiots in WD did? They crippled this standard mechanism by reporting 512B logical and 512B physical, or not reporing Physical sector size at all. This means any operating system, including 4kB-aware one, is not able to recognize, what physical sector size HDD realy use. The jumper you mentioned does not on and off the 512B emulation, but it moves LBA numbers +1. Obsolete Windows XP start first partition at LBA63, which is not aligned, when you use 4kB physical sector. Such a physical sector contains 8 logical (512B) sectors, thus you have to start at multiple of 8. Starting from LBA0, it is LBA8, LBA16, LBA24 etc... So with WD jumper LBA0 is marked as LBA1 etc.... So the WXP starting point LBA63 is physicaly LBA64, and the partition is alligned. This is really ugly hack, since you can not properly install other moder systems on such jumper-crippled drive. The problems described are mainly Windows driver related (binary chipset drivers from Intel, AMD, nVidia etc...). Updated drivers are able to operate larger drives. This is not true. GPT drives can be booted on BIOS system (non-EFI boards). BIOS does not forbid this! This is problem of obsolete Microsoft (in fact MS-DOS) booloader and partitioning scheme.
  14. StorageTux

    Seagate Barracuda Green 2TB Review

    The recognition itself is correct. But WD idiots crippled drives to lie about physical sector size. Pre-production drives reported 512B logical and 4kB physical. But the production drives hit the market with curiously crippled firmware reporting wrong values. The worst thing is, this is not a bug, but the feature. Here is the kernel developer commentary:
  15. StorageTux

    Seagate Barracuda Green 2TB Review

    What about the Seagate Smartalign and partition alignment? What physical and logical sector size drive reports to the OS?