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    hdd reliability

    To be honest, drive failure rate shouldn't be a big issue if you got everything properly arranged for. I always asserted that you should have any harddrive able to fail at any moment, without you having a bad day. It that's true, then you have properly configured your storage setup I think. But...
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    What is the best freeware diagnostic for an SSD?

    Never run SMART 'tests'. They aren't any good and actually destroy evidence. SMART is all about the attributes. People want to push a button and then say 'DRIVE FAILED!!!' or 'DRIVE GOOD!!'. But it does not work that way. SMART has to interpreted. Most applications which automate this, do a bad...
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    hdd reliability

    WD or Hitachi sounds like good choices to me. But any drive can fail after a month or so. No guarantees here. Most harddrives now have very limited warranty as well, as opposed to the past where 5 years or even 10 years was pretty common. Those golden days are behind us; the market for...
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    Hard Drive is unreadable or unaccessible, How to fix?

    First read the SMART data before doing anything else. Try CrystalDiskInfo and post a screenshot here with all attributes being visible. In particular, Current Pending Sector (Bad sectors) and UDMA CRC Error Count (Cabling errors) are important.
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    How to replicate an old server with a 3 disk RAID 5 array ?

    You can use the same system by using a Linux USB-stick, for example Ubuntu. After having booted, Ubuntu will see the physical drives that you have connected to the chipset SATA instead of the RAID controller. Then you can copy the contents off of it. Then you can connect the new disks to the...
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    How to replicate an old server with a 3 disk RAID 5 array ?

    If you make a 1:1 clone of the drives and insert it in the backup 'cold' system, it should pickup the RAID metadata and all should work. Making the 1:1 clone is best achieved using a non-Windows OS (Linux/BSD) and using a raw cloning application such as simple 'dd' - part of any UNIX-like...
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    Why are 15K HDDs not dead?

    Harddrives are proven devices. They are much simpler than SSDs which have like their own operating system. This is good for several things, but also makes it prone to obscure bugs. Harddrives thus are good for conservative users who want reliability and compatibility. The 15k ones still do...
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    hmm how to save this HD?

    Show us the SMART data if possible. CrystalDiskInfo is a Windows application that can read SMART data. ddrescue is the best suggestion really, if you are serious about the data. Right now, you already used chkdsk so a lot of damage to your files is likely to have happened already. This cannot...
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    8 GB vs 16 GB for gaming

    Some games utilise more RAM. For example, Master of Orion can actually use more than 16GB of RAM. Only 64-bit games can do this. Regular 32-bit games are limited to 2GiB RAM or 3GiB when specially compiled. Not that many games are 64-bit.
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    Is it safe to mix new and used SSDs to make a RAID 1?

    You should be aware that consumer-grade Samsung SSDs are unsuitable for anything other than standalone desktop usage, meaning no RAID or other form of complex storage. Samsung SSDs use PoR recovery mechanism that allows the SSD to go back in time after unexpected power loss. Other SSDs use...
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    Full format new harddisks?

    Well, a bad sector first has be known. If a sector is 'bad' but the harddrive does not know it - meaning it never failed a READ request - then overwriting that sector would not uncover the issue. Even worse, it would destroy any evidence of there ever been a bad sector. If a bad sector is...
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    Looking for a solid hardware SATA RAID 10 controller for Debian/Ubuntu system

    You can try Areca. But i find it a waste to use Hardware RAID at all, especially for RAID1. In general software RAID is superior for a number of reasons, particularly Linux has good software RAID (md-raid). Beware that many hardware RAID controllers require TLER-enabled harddrives, or the...
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    Quick Minor Question about UEFI and MBR vs GPT

    UEFI has dedicated boot partitions, whereas MBR means the first sector is the boot sector and there the boot code has to do everything. UEFI is more standardised and allows for more complex bootcode to be easily maintained. You CAN boot from GPT partitions without UEFI, just Windows is not able...
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    Full format new harddisks?

    I don't really see the point of formatting a new harddrive. If the purpose is to find disks that die rapidly, then you should read not write since things like bad sectors will not get detected upon writing. The only real valid point to format a harddrive is when using LUKS or other form of...
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    16gb ram user experience

    I think this interpretation is wrong, for the following reason: Having a lot of memory is not because your applications might be needing that much memory.... it is because of file cache. I would assert that your applications should be using 10 - 25% of your memory tops. The other 75%+ should...
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    Would WD 6TB Blue 5400RPM drive be bad for a NAS?

    I'd go along with that. :) But just to add, with "24/7 data transfers" you mean 100% duty cycle, right? That is something entirely different than using the drive 24/7 but idling most of the time. Smitbret is referring to real server usage where the disks are continuously doing I/O and seeking -...
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    Would WD 6TB Blue 5400RPM drive be bad for a NAS?

    To me this sounds like marketing speech without having any real technical relevance. According to my information Green and Red are physically the same drives. The only difference is the added tiny vibration sensor which is easily overestimated as a proper metal casing will neutralise vibrations...
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    WD RED External to Internal-Reformat? Where did files go?

    I suspect it is due to a different sector size. Many external casings increase the sectorsize to avoid the 2TiB limit for MBR partitions. By increasing it to 4KiB, the limit is increased to 16TiB without the need for GPT partitions. This does cause major issues if you remove the harddrive from...
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    High HD Tune numbers are they real?

    RAID0 doubles your sequential I/O and random IOps with multiple queue depth. So the numbers look fine. The fact you have SATA/300 does not mean you cannot go beyond 300MB/s, since you are using multiple SATA interfaces. Using two disks give you the maximum of 600MB/s bandwidth (in reality about...
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    Would WD 6TB Blue 5400RPM drive be bad for a NAS?

    WD Green (now sold as Blue) and WD Red are physically the same, aside from a tiny vibration sensor. The only difference is in warranty (3 years instead of 2 years in the EU) and in firmware, the Red has TLER-enabled firmware. This is why they sell them as 'NAS' drives. I think this is...
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    Proper preparation of 3tb hard disk for storage (advice wanted)

    No. The retention could be worse; but retention of unused sectors is irrelevant. It only starts to matter when you store data and then they will be written to by definition. So zero-writing in advance is utterly pointless IMO. Then you are doing it wrong. Sequential write on a 3TB drive should...
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    anyone know why my 5 drives of storage went raw all of a sudden and how to fix it?

    Start with SMART! CrystalDiskInfo.
  23. C

    How realistic are SSD benchmarks for gamers?

    Basically, yes. But remember that they capture the I/O on a pretty 'pristine' system which does not tally with real-life either way. The best way would be to capture the I/O patterns of an actual user system over multiple months time. Obviously that is much more time-consuming. Yes. The...
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    How realistic are SSD benchmarks for gamers?

    Well some games - including WoW - read textures during gameplay such as when a PVP player enters your world. This can lead to FPS drops that are quite noticeable. This happened to me when i did some gaming in the past with WoW in 'PVP Wintergrasp' area which is a massive PVP event. Because...
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    How realistic are SSD benchmarks for gamers?

    Most review sites - including AnandTech - use Trace&Replay benchmarks which are unrealistic because they replay all I/O at maximum speed on a fresh/defragmented state and do not properly time the idle times but instead truncate them. This leads to a deviation over realistic performance figures...
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    Benchmark problems with 840Pro

    He should verify whether the UDMA CRC Error Count keeps increasing. If it does, he still has cabling problems. Maybe his 'new' cable is in fact bad too. Or he may have folded the cable to steeply. Either way, 40.000+ cabling errors suggests this is his problem. The chance that the SSD is the...
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    Benchmark problems with 840Pro

    Issues with the drive? No, no no! Issues with the cabling. Do not blame things the drive can do nothing about. It is right there... UDMA CRC Error Count shows non-zero raw value. 0x9EE7 means 40679 cable errors. This most likely is the cause for his issues. Thus, replace the cable, and do...
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    Benchmark problems with 840Pro

    Read SMART with CrystalDiskInfo to rule out cabling errrors and use a real benchmark like AS SSD. Thanks!
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    Solutions for Western Digital HDD Slowdown/Failing

    Well, if there is no physical damage but the sector was unreadable due to bit errors exceeding the ECC error correcting capability of the drive (uBER bad sectors), then Reallocated Sector Count is not increased at all since the sector is not swapped with a reserve one. So in this case...
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    benefit of 16 vs 32gb of ram?

    You guys talk about RAM in use by applications. But i would argue that applications should only use 10-20% of your RAM at most. The other 90% of your RAM will be used for filecache instead, which is crucial to improve performance. Many talk about a 'RAMdisk' but this is an old fashioned way to...
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    Solutions for Western Digital HDD Slowdown/Failing

    Those most likely are normalised value. 200 probably is the best value for that drive, which could correlate with 0 bad sectors. Only the raw value is relevant in this case. So TS, please post the full SMART data. SMART is always the first step to diagnose your harddrive. Not really - he may...
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    Troubleshooting SSD RAID-0 Performance

    Not only that, but you are also stuck with your SSDs. Because you have SSDs with Sandforce controller, you have very low write performance. These SSDs are advertised with very high performance, but real performance is much lower. This is because Sandforce uses compression and deduplication...
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    Troubleshooting SSD RAID-0 Performance

    The screenshot in your first post seems to be from your Intel controller, not from an addon controller. Also it appears to be a RAID0 on two SATA/300 ports instead of SATA/600 ports. This would be in line with a situation where you use Intel onboard RAID0 on your Asus P6T board with X58 chipset...
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    Toshiba 7200rpm drives run hot?

    I doubt that is the case, since all heat generated by the drive originates from its power consumption. And the motor to keep the drive spinning and the seek power the head receives should not differ all that much between samples. Surely not enough to allow one drive to be significantly cooler or...
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    Is an MMO on an SSD a good idea?

    @Phynaz: what are you talking about? SSD endurance is only relevant for SOHO/enterprise users not for consumers. All regular SSDs are durable enough for common usage. @Craig234: yes MMO's are among the games that benefit the most from SSDs. This is because they tend to do I/O while the game is...
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    SSD Power loss protection?

    Well, Intel calls their capacitors 'Enhanced power-loss protection' where enhanced indicates it is an extra protection. This is technically more correct since without capacitors, you still need at least some sort of protection, or your SSD will be corrupted very easily, as happened frequently...
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    SSD Power loss protection?

    It depends on the terminology, but every SSD ought to have some kind of protection against FTL corruption, or the entire SSD will be 'bricked' resulting in total data loss and a non-functional drive which can only be resolved by perfoming a HPA secure erase procedure. Such a procedure wipes the...
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    850 Pro and atrocious sequential read speeds

    Start with showing us some benchmarks? AS SSD, CrystalDiskMark? Start with giving us your specs, your motherboard, what controller you connected your SSD to? This is the very minimum to help you with your problem.
  39. C

    RAID controllers

    A BIOS upgrade will not wipe the config - the configuration is stored on the disks itself in the last sector of each harddrive - the 'metasector'. That is why you can move the disks to another motherboard of the same class, or same brand chipset, and it should work. With Intel onboard RAID, the...
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    SSD/HDD Alignment

    You DO need to align for modern harddrives! Only older harddrives of <1TB often do not need alignment, because those are classic drives with 512-byte sectorsize. Modern harddrives are so called 'Advanced Format' harddrives - also known as 512e. This means they pretend to be 512-byte sector...
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