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If your computer displays a read-only vmware esx linux filesystem error code, see these troubleshooting tips.
Although this is a relatively old question, the answer is still the same. Have a trusted virtual machine (running on a physical host) and some type of storage (either provisioned storage – FC SAN, iSCSI storage, NFS share – or group storage).
During virtualization, many virtual machines try to access the same physical resources as before. Due to physical constraints (read / write – IOPS; bandwidth; latency), there can be a problem with all the individual storage requirements of all physical machines at the same time. What usually happens: A human can see “SCSI retries” and, as a result, failed SCSI operations on your VM sprint systems. In cases where too many errors / retries occur over a period of time, the kernel installs read-only mounted filesystems to avoid damage to the filesystem.In short: your physical memory is often not “efficient” enough. Also thousands of processes (virtual machines) are simultaneouslyIf they are accessing computer storage, your virtual devices are not receiving a response from anyone’s storage fast enough, and the file system is started read-only.
There is little your business can do. The obvious solution is usually better storage / extra storage. You can also change certain settings for SCSI timeouts in the Linux kernel. Details are described, for example, in:
However, this can only “delay” the resolution of your problems if you think the kernel only has more time before the filesystem itself becomes write-protected. (That is, you won’t get to the source of the new problem.)
My experience (several years of experience with VMware) shows that this problem only exists with Linux popcorn kernels (we use RHEL and SLES) and not necessarily Windows servers. In addition, difficulties arise with all types of storage – FC, iSCSI, local storage. For the United States, storage is a series of critical (and expensive) components of our core infrastructure. Now (we are using HP LeftHand with 1Gbps iSCSI connections and we have had no storage issues since then The face. We chose LeftHand (over traditional FC solutions) because of its scalability.
The following section only includes later versions of PGP Universal Server 2.5.x – 2.12.0 running on VMWare ESX Server 3.x.x
- Create a good and reliable new virtual machine in VMWare with the ability to configure virtual devices.
- When prompted to allow the I / O adapter type, select BusLogic as the SCSI adapter type.
- option to use the server ISO image for the virtual machine CD.
- Boot the machine virtually to use an accurate CD-ROM. The installation will begin.
- Follow the instructions on the screen to complete the web server installation.
- After the initial installation, set up a browser connection to this server in the
section. here https: //
: 9000 and / or https: // : 9000 - The configuration wizard may appear.
- On the Configuration Type screen, select an option to restore.
- Select the backup of the bank statement you want to restoreupdate.
- Complete the remaining screens to enable server backup.
Select the
This section applies to Universal pgp Server 3.x and Symantec Encryption Management Server 3.3.x.
Use of the LSI SCSI driver is required on PGP Universal Server 3.x and Symantec Encryption Management Server 3.3.x. The BusLogic driver should no longer be used.
The problem of mounting a file on Linux in system read-only mode can still occur due to the slow internal hard drive on the ESX server.
This is a known issue with VMWare and details are available on the VMWare Support website, see VMware KB 51306.
“VMware has encountered an issue that could cause file systems to become read-only after I / O retry with busy I / O or SAN or iSCSI path failover failure.
The same behavior is expected in a dedicated Linux environment, where the time it takes for a file system to become read-only depends on the number of paths available for a given target, multi-path patch in the operating system. and whether there was an unsuccessful I / O log Alom EXT3. However, the problem is compounded in an ESX host environment, as the ESX host supports multiple paths to reach the storage destination and exposes each path to the guest operating system, thereby reducing the number of guest attempts. “
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The error message or similar error messages may belong to those who saw the “dmesg” command when the problem occurred:
"INFORMATION: Postmaster task: 10857 blocked for more than one hundred seconds."
"Buffer I / O error on device sda2, clear block 23711793
Writing a page lost due to an I / O error on sda2
sd 0: 0: 0: 0: sync request expired, expected 1080 seconds
sd 0: 0: 0: 0: error code not processed
sd 0: 0: 0: 0: SCSI error: return code = 0x06000008 "
The below simple errors will be displayed when the entire file body is mounted read-only.
"Error EXT3-fs (sda2 device): ext3_journal_start_sb: thrown journal found
Read-only replacement
mptscsih: file system ioc0: schedule job aborted! (sc = f0d76700) "
V In this case, the database goes into recovery mode, and part of the server stops working.
Establishing a connection to your database on key2 failed on every error:
"Psql: FATAL: database system is in high modernization mode"
During disk I / O, a very high percentage of CPU wait, about 50% or more, can be observed with the “top” command
On VMware ESX Server, the following error messages indicate that the hard drive is not available for these Linux systems.
Error 0x2 (This state is returned before the HBA driver fails so that it can send a command to the device and get a seat due to FCP frame failures)
Error 0x8 (returned when the HBA driver cancels I / O and forces the target to be reset)
To resolve this issue now, you need to modify the VMware ESX server to avoid hard disk read / write errors.
This issue is caused by a file design error related to an adapter issue in our virtual machine. The reason for this type of error is m It could be a combination of a Linux driver and an LSI virtual device if it is a virtual machine. This issue can sometimes actually be related to machines running on SAN or iSCSI storage.
This has been recognized as a VMWare issue and is documented on the VMWare support site.
Since the issue only affects the LSI adapter logic in VMWare ESX, it is recommended that you use the Boolean type BusAdapter to resolve the issue.
To fix the problem, you should also restore the best server data from a backup. For example, backups contain information needed to restore the exact state of the network at the time the homebrew was created, including proxies and policy sets, as well as keys and user-friendly information. It is recommended that you regularly back up everything on your servers. Each backup is a full backup.
To take advantage of the BusLogic Adapter for PGP Universal Server from a virtual machine:
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