Update engine log failure

[0801/134020:INFO:action_processor.cc(116)] ActionProcessor: finished DownloadAction with code ErrorCode::kSuccess
[0801/134020:INFO:action_processor.cc(143)] ActionProcessor: starting OmahaRequestAction
[0801/134020:INFO:omaha_request_action.cc(680)] Posting an Omaha request to http://127.0.0.1:37627/update/pregenerated
[0801/134020:INFO:omaha_request_action.cc(681)] Request: <?xml version="1.0" encoding="UTF-8"?>
<request protocol="3.0" version="ChromeOSUpdateEngine-0.1.0.0" updaterversion="ChromeOSUpdateEngine-0.1.0.0" installsource="ondemandupdate" ismachine="1">
    <os version="Indy" platform="Chrome OS" sp="9798.0.0_x86_64"></os>
    <app appid="{BB86912A-29BE-A59B-31EF-8F4DD1C023E2}" version="9798.0.0" track="stable-channel" lang="en-US" board="enguarde" hardware_class="ENGUARDE A2A-A4K-E6A-A6O" delta_okay="true" fw_version="" ec_version="" installdate="3864" >
        <event eventtype="14" eventresult="1"></event>
    </app>
</request>

[0801/134020:ERROR:utils.cc(88)] AddDBusError(...): Domain=dbus, Code=org.freedesktop.DBus.Error.ServiceUnknown, Message=The name org.chromium.NetworkProxyService was not provided by any .service files
[0801/134020:WARNING:chrome_browser_proxy_resolver.cc(121)] Failed to resolve proxy: The name org.chromium.NetworkProxyService was not provided by any .service files
[0801/134020:INFO:libcurl_http_fetcher.cc(146)] Starting/Resuming transfer
[0801/134020:INFO:libcurl_http_fetcher.cc(165)] Using proxy: no
[0801/134020:INFO:libcurl_http_fetcher.cc(286)] Not setting http(s) curl options because we are running a dev/test image
[0801/134020:INFO:libcurl_http_fetcher.cc(433)] HTTP response code: 200
[0801/134020:INFO:libcurl_http_fetcher.cc(509)] Transfer completed (200), 253 bytes downloaded
[0801/134020:INFO:omaha_request_action.cc(940)] Omaha request response: <?xml version="1.0" encoding="UTF-8"?>
  <response protocol="3.0">
    <daystart elapsed_seconds="49220"/>
    <app appid="{87efface-864d-49a5-9bb3-4b050a7c227a}" status="ok">
      <ping status="ok"/>
      <event status="ok"/>
    </app>
  </response>
[0801/134020:INFO:action_processor.cc(116)] ActionProcessor: finished OmahaRequestAction with code ErrorCode::kSuccess
[0801/134020:INFO:action_processor.cc(143)] ActionProcessor: starting FilesystemVerifierAction
[0801/134020:INFO:filesystem_verifier_action.cc(111)] Hashing partition 0 (system) on device /dev/mmcblk0p3
[0801/134314:ERROR:file_stream.cc(461)] ReadNonBlocking(...): Domain=system, Code=EIO, Message=Input/output error
[0801/134314:ERROR:filesystem_verifier_action.cc(154)] Unable to schedule an asynchronous read from the stream.
[0801/134314:INFO:prefs.cc(122)] delta-update-failures not present in /var/lib/update_engine/prefs
[0801/134314:INFO:action_processor.cc(116)] ActionProcessor: finished FilesystemVerifierAction with code ErrorCode::kError
[0801/134314:INFO:action_processor.cc(121)] ActionProcessor: Aborting processing due to failure.
[0801/134314:INFO:update_attempter.cc(881)] Processing Done.
[0801/134314:INFO:cpu_limiter.cc(71)] Setting cgroup cpu shares to  1024
[0801/134314:INFO:cpu_limiter.cc(79)] CPU shares = 1024
[0801/134314:ERROR:update_attempter.cc(1277)] Update failed.
[0801/134314:INFO:payload_state.cc(248)] Updating payload state for error code: 47 (ErrorCode::kFilesystemVerifierError)

The versions we were updating from and to were different. But the DUT was the same: chromeos4-row10-rack2-host19

+jkwang@ showed me similar error. To me it looks like UE could not read from /dev/mmcblk0p3. Could any changes in kernel or changes related to hdd firmware cause this? There has been no changes in UE recently that could have caused this.

Well.. as it's the same DUT. Would there be something wrong with the DUT setup?

This is no longer an issue