NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
resinch a dieing disk or add new disk & resinch?
Apologies again. I posted the same message in the "Test" board, and got complete unnoticed / unseen. As it is rather urgent, I am re-posting it here, where I hope it will be seen. I could not find a b...
Sorry Stephen,
Your replied only showed up today (31st), while I pasting a new post. For the last week I was refreshing the page few times every day, with no changes.
AHHH it was on the next page ! Shuck, wasted one week, I was awaiting for a reply on those two queries before doing something which may be wrong. .
I'll do that now.
I am under the impression that, notwithstanding the "Pass" from Seatools and Lifeguard, you are convinced that HD1 is utterly faulty (well, NAS flagged it as "fail"). Which is why you are suggesting the "destructive Seatools test" which could "tick out" the offending block, and return it to the unformatted state (this is in my "option 2").
I am more concerned by the potential data loss.
Is hot-inserting immediately the new disk in bay 4 (before the Volume Scan) going to be safer than my option 2 or option 3 below ?
Also, before I do anything, could it be valuable to empty bay 2 and bay 3, boot up NAS without any disk (to avoid a Volume scan and potential data loss), just to read the log to see if there is more info in that log? I remember reading "disk fail" and nothing else, but maybe that was only a label and there are more infos somewhere else (where, or how to read it?).
To recap, I could
Option 1 - (your suggestion)
a) hot-insert the new replacing disk (in bay1 or bay4, or it is immaterial? I'd prefer bay4, so the bay order matches the HD age)
b) Resinch
c) destructive test/reformat HD1
d) hot-insert HD1 causing another resynch
This way the first resynch is done using data from only two disks (compromised volume, potential data loss?).
Option 2
a) remap the block (to avoid NAS flagging a slow disk),
b) refit HD1 in bay1 and add HD4 in bay4 at the same time. NAS will resynch (volume NOT compromised, albeit needing a resinch, so no data loss?)
c) Switch off NAS, remove HD1 in bay 1, run Seatools destructive test /reformatting.
d) reboot NAS and hot-insert HD1 back. NAS will re-sinch again (but volume was compromised by HD removal, so potential data loss?).
Doing this way all the resynching is done on 4 disks, with data always availlable on 3 disks; the first time the volume is not compromised, the second time the volume is compromised, but the data is spread more thinly across the 4 disks.
Option 3
a) remap the block, (to avoid NAS flagging a slow disk)
b) refit HD1 in bay1, NAS will resynch (with no data loss)
c) after resynch, hot insert HD4 in Bay 4, resynch again to increase the size of the volume
Done ! Do not reformat HD1, as the bad block has been remapped. But this may cause loss of performance (extra seeking?)
Which one could be the safer for the data, and in the long run ?
Many thanks in advance, sorry for being incommunicado for a week, berillio
Your replied only showed up today (31st), while I pasting a new post. For the last week I was refreshing the page few times every day, with no changes.
AHHH it was on the next page ! Shuck, wasted one week, I was awaiting for a reply on those two queries before doing something which may be wrong. .
Personally I run the vendor diags before insertion, but that is up to you.
I'll do that now.
I am under the impression that, notwithstanding the "Pass" from Seatools and Lifeguard, you are convinced that HD1 is utterly faulty (well, NAS flagged it as "fail"). Which is why you are suggesting the "destructive Seatools test" which could "tick out" the offending block, and return it to the unformatted state (this is in my "option 2").
I am more concerned by the potential data loss.
Is hot-inserting immediately the new disk in bay 4 (before the Volume Scan) going to be safer than my option 2 or option 3 below ?
Also, before I do anything, could it be valuable to empty bay 2 and bay 3, boot up NAS without any disk (to avoid a Volume scan and potential data loss), just to read the log to see if there is more info in that log? I remember reading "disk fail" and nothing else, but maybe that was only a label and there are more infos somewhere else (where, or how to read it?).
To recap, I could
Option 1 - (your suggestion)
a) hot-insert the new replacing disk (in bay1 or bay4, or it is immaterial? I'd prefer bay4, so the bay order matches the HD age)
b) Resinch
c) destructive test/reformat HD1
d) hot-insert HD1 causing another resynch
This way the first resynch is done using data from only two disks (compromised volume, potential data loss?).
Option 2
a) remap the block (to avoid NAS flagging a slow disk),
b) refit HD1 in bay1 and add HD4 in bay4 at the same time. NAS will resynch (volume NOT compromised, albeit needing a resinch, so no data loss?)
c) Switch off NAS, remove HD1 in bay 1, run Seatools destructive test /reformatting.
d) reboot NAS and hot-insert HD1 back. NAS will re-sinch again (but volume was compromised by HD removal, so potential data loss?).
Doing this way all the resynching is done on 4 disks, with data always availlable on 3 disks; the first time the volume is not compromised, the second time the volume is compromised, but the data is spread more thinly across the 4 disks.
Option 3
a) remap the block, (to avoid NAS flagging a slow disk)
b) refit HD1 in bay1, NAS will resynch (with no data loss)
c) after resynch, hot insert HD4 in Bay 4, resynch again to increase the size of the volume
Done ! Do not reformat HD1, as the bad block has been remapped. But this may cause loss of performance (extra seeking?)
Which one could be the safer for the data, and in the long run ?
Many thanks in advance, sorry for being incommunicado for a week, berillio
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
