Disk Drill doesn’t protect (external) Drives larger than 2TB? And false-negative bad clusters?

Disk Drill for Mac and Windows – Help Center Forums General Disk Drill doesn’t protect (external) Drives larger than 2TB? And false-negative bad clusters?

This topic contains 13 replies, has 5 voices, and was last updated by  mynameisJR 4 years ago.

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #4395

    Sam
    Participant

    I heard somewhere that drives larger than 2TB are treated differently by various operating systems and programs.
    when I tried Disk Drill Basic with some external 3TB firewire drives (and various partitions on)
    (#1) all of them showed as having a GPT-safety-partition and a huge unallocated partition. Tried further to reformat one of them as MBR – GPT with all sorts of test partitions – still the same result.
    (#2) Strangely enough all where marked too as having 129 bad clusters starting at 128.
    A surface check could not verify this. BTW a same brand 2TB ran fine in all ways.

    Now is this (#1) a lack of feature and/or a bug (#2)?
    Was hoping strongly for some tool to protect my external data too.

    DD looks very promising and has good reviews in general so I would appreciate some hint to either clarify this situation or a workaround

    Thank you

    #4950

    mynameisJR
    Participant

    Sam, which drive brand are we speaking about here? We ran several tests with 3TB Seagate drives recently and were not able to locate any issues at all.

    #4951

    Sam
    Participant

    Hi JR, the big drives that I am using are 3TB Seagate Goflex with firewire adapter socket. (system report calls them GoFlex Desk and FA GoFlex Desk). DD ignores their partitions and shows them only in the way mentioned above. I own several of them, one just newly purchased. Then I swapped one by chance with a 2TB of the same brand by putting it on the same above firewire socket and all the partitions where showing w/o problem, nor where any bad blocks detected.

    #4954

    Sam
    Participant

    Hi JR, Do you have any new findings about external 3TB Seagate GoFlex that would show how Diskdrill could protect this drives ? Thank you

    #4957

    mynameisJR
    Participant

    We are still investigating this. We are trying to confirm that disks of that size highly rely on the connector quality, I’ll keep you updated of our progress.

    #4962

    Yoger
    Participant

    Hi Sam and JR, I also have a Seagate FreeAgent GoFlex Desk Mac 3TB firewire drive and it shows the same behavior on DD. BTW, if you list the Drives the GoFlex is says that the disck contain DOS partitions (the drive was partitioned as GUID)

    #4963

    mynameisJR
    Participant

    Yoger, do you mean that your disk produces the same issue in Disk Drill? Or did you mean yours is working fine?

    #4979

    Federalman
    Participant

    I have the same issue. I have a Seagate FreeAgent GoFlex Desk Mac 3TB USB 3 drive and DD reports:
    1. GPT-safety-partition (0xEE) (349.31 GB)
    and
    2. A 2.39GB unallocated partition.

    This was formatted as HFS+ but shows up as 2.73 GB of DOS partitions.

    It is also reported as having 129 bad clusters starting at 128.

    #4982

    mynameisJR
    Participant

    We are still checking the issue with Seagate FreeAgent GoFlex Desk Mac 3TB. Hold on, please.

    #5002

    vw79
    Participant

    Hello,

    I have the same problem with:
    Western Digital Ext HDD 1021 2.5TB USB2
    Western Digital Ext HDD 1021 3.0TB USB2.
    Western Digital My Book 1130 3.0TB USB3.

    1. A GPT-safety-partition (0xEE) (349.31 GB)
    2. An unallocated partition (2.39GB)
    filesystem: no hfs, no fat32, just raw for both partitions.

    Each 3 WD-HDD get 128 defect blocks starting at #129.

    No problem With Western Digital Ext HDD 1021 2.0TB USB2

    The problem seems to be some Hard Disk bigger than 2TB.

    Thank you

    #5004

    mynameisJR
    Participant

    We’ll send you a build with potential fix via email. Anyone having the same issue with Goflex and other drives, email us.

    #5006

    vw79
    Participant

    I made a mistake

    1. A GPT-safety-partition (0xEE) (349.31 GB)
    2. An unallocated partition (2.39 TB) <– not 2.39 GB

    Whole size: 2.73 TB

    #5009

    mynameisJR
    Participant

    Have you received the test build?

    #5028

    mynameisJR
    Participant

    We suppose this issue fixed with the latest update: /help/disk-drill-1-8-198/

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