[OpenIndiana-discuss] io errors in rpool, was surprising error when I try to install a package

Thu Mar 10 23:27:15 UTC 2022

FYI, both hard drives and SSDs internally reallocate defective sectors onto working ones when the problem "block" is written over (it is really just an address, and it changes out the physical storage location backing it).  With SSDs it is actually more internally complex than hard drives, but the principle is the same: the OS doesn't track the defective sectors, the drive does, and fills in with spare working sectors when it gets new data, so the OS doesn't have to care.  This is what the "current pending sectors", "offline uncorrectable", etc in the SMART attributes mean.

For hard drives, some sectors going bad is an early sign that there may be a catastrophic failure in the near future.  For SSDs, it isn't as clear what it means - it could be a one-time event from unexpected power loss, if the drive isn't robust to that (some drive models are designed to handle it, others lose recent writes, and some become bricks), or being powered off for a very long time, or outside its temperature range, or it could be manufacturing defects, etc.

Tim

________________________________
From: Marc Lobelle <marc.lobelle at uclouvain.be>
Sent: Thursday, March 10, 2022 4:09 AM
To: Toomas Soome via openindiana-discuss <openindiana-discuss at openindiana.org>
Subject: Re: [OpenIndiana-discuss] io errors in rpool, was surprising error when I try to install a package

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Hi Toomas,

Indeed I have problems with the local storage. This notebook has a
single ssd drive (rpool) and scrubbing it finds unrecoverable errors

ml at mosquito:/export/home/ml# zpool status -v
   pool: rpool
  state: DEGRADED
status: One or more devices has experienced an error resulting in data
         corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
         entire pool from backup.
    see: https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fillumos.org%2Fmsg%2FZFS-8000-8A&data=04%7C01%7Ctsc5yc%40mst.edu%7Ccf37e7e3825c491d0a0508da027e138c%7Ce3fefdbef7e9401ba51a355e01b05a89%7C0%7C0%7C637825038199891448%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=ZyewsG4qTnB2yrH%2FSYaXn2FhHm2mV5sfMCvWPbL8vhQ%3D&reserved=0
   scan: scrub in progress since Wed Mar  9 18:41:08 2022
         141G scanned at 179M/s, 31,0G issued at 39,2M/s, 142G total
         0 repaired, 21,91% done, 0 days 00:48:07 to go
config:

         NAME        STATE     READ WRITE CKSUM
         rpool       DEGRADED     2     0     3
           c6t0d0s0  DEGRADED     2     0     6  too many errors

errors: Permanent errors have been detected in the following files:

         rpool/ROOT/openindiana-2022:02:16:<0x881c0>
         rpool/dump:<0x1>
         rpool/swap:<0x1>
         /export/home/ml/.local/share/Trash/files/Capture du 2022-03-03
15-11-12.png
         rpool/export/home/ml:<0x147d>
rpool/ROOT/openindiana-2022:02:16 at 2022-03-04-09:38:53:/var/pkg/state/known/catalog.summary.C
rpool/ROOT/openindiana-2022:02:16 at 2022-03-04-09:38:53:/var/pkg/state/known/catalog.dependency.C
rpool/ROOT/openindiana-2022:02:16 at install:/usr/share/doc/dbus/api/group__DBusMessageInternals.html
rpool/ROOT/openindiana-2022:02:16 at install:/usr/share/doc/libsigc++-2.0/reference/html/inherit_graph_24.png
rpool/ROOT/openindiana-2022:02:16 at install:/usr/share/doc/libsigc++-2.0/reference/html/modules.html
Loosing a few blocks on a 1 TB ssd is acceptable if the OS can avoid
using these faulty blocks in the future. What does zpool do if I do a
zpool clear: the faults will disappear from the status but will the
faulty blocs be avoided henceforth ?

The corrupted files are lost but, if I do "pkg refresh --full; pkg
update -v", I assume they will be replaced.

However if the faulty blocks are not removed from the list of usable
blocks, the faults will happen again and the drive must be considered as
lost and to be replaced

On 3/9/22 09:22, Toomas Soome via openindiana-discuss wrote:
>> On 9. Mar 2022, at 10:15, Marc Lobelle<marc.lobelle at uclouvain.be>  wrote:
>>
>> Hello,
>>
>> I got a surprising error when trying to install packages (any package, even xeyes) on one of my computers running openindiana: *Error encountered while retrieving data from: [Errno 5] I/O error.*
>>
>> Anybody knows what to do ?
>>
>> Thanks and best regards
>>
>> Marc
> there are two possible causes, either it is some sort of network issue (truss -f pkg…. and see what will get EIO), or it is issue with local storage (zpool scrub?).
>
> rgds,
> toomas
>
>
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